1 APACHE 2.4 STATUS: -*- mode: text; coding: utf-8 -*-
2 Last modified at [$Date$]
4 The current version of this file can be found at:
6 * http://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x/STATUS
8 Documentation status is maintained separately and can be found at:
10 * docs/STATUS in this source tree, or
11 * http://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x/docs/STATUS
13 The current development branch of this software can be found at:
15 * http://svn.apache.org/repos/asf/httpd/httpd/trunk
17 Consult the following STATUS files for information on related projects:
19 * http://svn.apache.org/repos/asf/apr/apr/trunk/STATUS
20 * http://svn.apache.org/repos/asf/apr/apr/branches/1.4.x/STATUS
21 * http://svn.apache.org/repos/asf/apr/apr-util/branches/1.4.x/STATUS
22 * http://svn.apache.org/repos/asf/apr/apr/branches/1.5.x/STATUS
23 * http://svn.apache.org/repos/asf/apr/apr-util/branches/1.5.x/STATUS
25 Patches considered for backport are noted in their branches' STATUS:
27 * http://svn.apache.org/repos/asf/httpd/httpd/branches/2.0.x/STATUS
28 * http://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x/STATUS
29 * http://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x/STATUS
34 [NOTE that x.{odd}.z versions are strictly Alpha/Beta releases,
35 while x.{even}.z versions are Stable/GA releases.]
37 2.4.26 : In development.
38 2.4.25 : Tagged on December 16, 2016. Released on December 21, 2016.
39 2.4.24 : Tagged on December 16, 2016, not released.
40 2.4.23 : Tagged on June 30, 2016. Released on July 05, 2016.
41 2.4.22 : Tagged on June 20, 2016, not released.
42 2.4.21 : Tagged on June 16, 2016, not released.
43 2.4.20 : Tagged on April 4, 2016. Released on April 11, 2016.
44 2.4.19 : Tagged on March 21, 2016, not released.
45 2.4.18 : Tagged on December 8, 2015. Released on December 14, 2015.
46 2.4.17 : Tagged on October 9, 2015. Released October 13, 2015.
47 2.4.16 : Tagged on July 9, 2015. Released July 15, 2015
48 2.4.15 : Tagged on June 19, 2015. Not released.
49 2.4.14 : Tagged on June 11, 2015. Not released.
50 2.4.13 : Tagged on June 4, 2015. Not released.
51 2.4.12 : Tagged on January 22, 2015. Released Jan 29, 2015
52 2.4.11 : Tagged on January 15, 2015. Not released.
53 2.4.10 : Tagged on July 15, 2014. Released July 21, 2014
54 2.4.9 : Tagged on March 13, 2014. Released on March 17, 2014
55 2.4.8 : Tagged on March 11, 2014. Not released.
56 2.4.7 : Tagged on November 19, 2013. Released on Nov 25, 2013
57 2.4.6 : Tagged on July 15, 2013. Released July, 22, 2013
58 2.4.5 : Tagged on July 11, 2013, not released.
59 2.4.4 : Tagged on February 18, 2013. Released Feb 25, 2013
60 2.4.3 : Tagged on August 17, 2012. Released Aug 18, 2012
61 2.4.2 : Tagged on April 5, 2012. Released Apr 17, 2012.
62 2.4.1 : Tagged on February 13, 2012. Released Feb 21, 2012.
63 2.4.0 : Tagged on January 16, 2012, not released.
64 2.3.16 : Tagged on December 15, 2011.
65 2.3.15 : Tagged on November 8, 2011. Released Nov. 15, 2011.
66 2.3.14 : Tagged on August 1, 2011. Released Aug. 9, 2011.
67 2.3.13 : Tagged on June 28, 2011, not released.
68 2.3.12 : Tagged on May 11, 2011. Released May 23, 2011.
69 2.3.11 : Released as Beta on March 7, 2011.
70 2.3.10 : Tagged on December 13, 2010. Released Dec 21, 2010.
71 2.3.9 : Tagged on November 23, 2010, not released.
72 2.3.8 : Tagged on August 24, 2010.
73 2.3.7 : Tagged on August 19, 2010, not released.
74 2.3.6 : Released on June 21, 2010.
75 2.3.5 : Released on January 26, 2010.
76 2.3.4 : Released on December 8, 2009.
77 2.3.3 : Tagged on November 11, 2009, not released.
78 2.3.2 : Tagged on March 23, 2009, not released.
79 2.3.1 : Tagged on January 2, 2009, not released.
80 2.3.0 : Tagged on December 6, 2008, not released.
82 Contributors looking for a mission:
84 * Just do an egrep on "TODO" or "XXX" in the source.
86 * Review the bug database at: http://issues.apache.org/bugzilla/
88 * Review the "PatchAvailable" bugs in the bug database:
90 https://issues.apache.org/bugzilla/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&product=Apache+httpd-2&keywords=PatchAvailable
92 After testing, you can append a comment saying "Reviewed and tested".
94 * Open bugs in the bug database.
96 * See also the STATUS file in the docs/ directory, which lists documentation-specific TODO items.
99 CURRENT RELEASE NOTES:
101 * Forward binary compatibility is expected of Apache 2.4.x releases, such
102 that no MMN major number changes will occur after 2.4.1. Such changes can
103 only be made in the trunk.
105 * All commits to branches/2.4.x must be reflected in SVN trunk,
106 as well, if they apply. Logical progression is commit to trunk
107 then merge into branches/2.4.x, as applicable.
109 * Current exceptions for RTC for this branch:
114 . non-Unix, single-platform code
116 RELEASE SHOWSTOPPERS:
118 PATCHES ACCEPTED TO BACKPORT FROM TRUNK:
119 [ start all new proposals below, under PATCHES PROPOSED. ]
121 *) mod_cache: Fix a regression in 2.4.25 for the forward proxy case by
122 computing and using the same entity key according to when the cache
123 checks, loads and saves the request. PR 60577.
124 trunk patch: http://svn.apache.org/r1783842
125 2.4.x patch: trunk works (modulo CHANGES)
126 +1: ylavic, jim, covener
128 *) mod_proxy_hcheck: Ensure thread-safety when concurrent healthchecks are
129 in use (ProxyHCTPsize > 0). PR 60071.
130 trunk patch: http://svn.apache.org/r1779573
131 2.4.x patch: trunk works (modulo CHANGES)
132 +1: ylavic, jim, covener (desk-check only)
135 PATCHES PROPOSED TO BACKPORT FROM TRUNK:
136 [ New proposals should be added at the end of the list ]
138 *) mod_proxy, mod_ssl: Handle SSLProxy* directives in <Proxy> sections,
139 allowing per backend TLS configuration.
140 trunk patch: http://svn.apache.org/r1740928
141 http://svn.apache.org/r1740960
142 http://svn.apache.org/r1740967
143 http://svn.apache.org/r1740987
144 http://svn.apache.org/r1740998
145 http://svn.apache.org/r1742697
146 http://svn.apache.org/r1756976
147 http://svn.apache.org/r1781313
148 2.4.x patch: http://home.apache.org/~ylavic/patches/httpd-2.4.x-r1740928_and_co-v3.patch
151 *) mod_proxy_hcheck: Don't validate timed out responses.
152 trunk patch: http://svn.apache.org/r1779574
153 http://svn.apache.org/r1779623
154 2.4.x patch: trunk works *after r1779573 above* (modulo CHANGES)
157 *) mod_ssl: backport fix for PR 46037
158 trunk patch: http://svn.apache.org/r1781575
159 http://svn.apache.org/r1781577
160 http://svn.apache.org/r1781580
161 http://svn.apache.org/r1781687
162 http://svn.apache.org/r1783305
163 2.4.x patch: http://people.apache.org/~jfclere/patches/patch.46037.txt
165 wrowe asks: Can we capitalize Verify in SSLOCSPNoverify to keep
167 ylavic: +1 with http://svn.apache.org/r1788430, fixing the merge of
168 SSLOCSPNoverify and capitalizing as suggested above.
170 *) mod_proxy_hcheck: Honor checks in Vhosts
171 trunk patch: http://svn.apache.org/r1784203
172 http://svn.apache.org/r1784205
173 http://svn.apache.org/r1784227
174 http://svn.apache.org/r1784228
175 http://svn.apache.org/r1784275
176 http://svn.apache.org/r1785871
177 http://svn.apache.org/r1786009
178 2.4.x patch: trunk works *after r1779573 above* (modulo CHANGES)
179 FULL hcheck patch: http://home.apache.org/~jim/patches/httpd2.4-hcheck.patch
180 (includes all hcheck related patches, including showstopper)
182 ylavic: 'tpsize' needs to be reset (to HC_THREADPOOL_SIZE) in pre_config,
183 otherwise if mod_proxy_hcheck is builtin/static and for example
184 ProxyHCTPsize were commented out on restart, we wouldn't use the
185 default value (as expected).
187 *) mod_autoindex: Add IndexOptions UseOldDateFormat to allow the date
188 format from 2.2 in the Last Modified column. PR60846.
189 trunk patch: http://svn.apache.org/r1787525
190 http://svn.apache.org/r1787553
191 http://svn.apache.org/r1788451
192 2.4.x patch: trunk works
195 *) mod_proxy: Allow the per-request environment variable "no-proxy" to
196 be used as an alternative to ProxyPass /path !. This is primarily
197 to set exceptions for ProxyPass specified in <Location> context.
198 trunk patch: http://svn.apache.org/r1781328
199 http://svn.apache.org/r1785907
200 2.4.x patch: trunk works
203 *) core: Add %{REMOTE_PORT} to the expression parser. PR59938
204 trunk patch: http://svn.apache.org/r1776459
205 http://svn.apache.org/r1788508
206 2.4.x patch: trunk works
210 PATCHES/ISSUES THAT ARE BEING WORKED
211 [ New entried should be added at the START of the list ]
213 *) mod_brotli: Backport of mod_brotli filter
214 trunk patch: http://svn.apache.org/r1761714
215 http://svn.apache.org/r1762512
216 http://svn.apache.org/r1762515
217 http://svn.apache.org/r1771791
218 http://svn.apache.org/r1779077
219 http://svn.apache.org/r1779091
220 http://svn.apache.org/r1779699
221 2.4.x patch: http://home.apache.org/~jim/patches/brotli-2.4.patch
223 -1: wrowe (Premature, waiting on github.com/google/brotli 0.6 release)
224 NOTE: Awaiting next release post 0.5.2
226 *) mod_remoteip: Add PROXY protocol support
227 trunk patch: http://svn.apache.org/r1776575
228 http://svn.apache.org/r1776578 (doc fix)
229 http://svn.apache.org/r1776627 (shortened name + doc fix)
230 http://svn.apache.org/r1776674 (attribution moved to CHANGES)
231 http://svn.apache.org/r1776740 (attribution updated in mod_remotip.c)
232 http://svn.apache.org/r1778268 (fix compiler warning)
233 http://svn.apache.org/r1780725 (set buckets aside)
234 http://svn.apache.org/r1781030 (fix strict GCC warning)
235 http://svn.apache.org/r1781031 (reference the filter by handle)
236 http://svn.apache.org/r1781701 (rework optional processing case)
237 2.4 convenience patch (includes CHANGES):
238 http://people.apache.org/~druggeri/patches/RemoteIPProxyProtocol.2.4.x.patch
240 -0.5: wrowe (Still reviewing support of unwise 'optional' schema vs. other
241 possibile solves; questioning reading-but-ignoring PROXY
242 protocol input, also seems unwise)
244 *) mod_ssl: Return 502 instead of 500 when SSL peer check or
245 proxy_post_handshake hook fails.
246 Trunk patch: r1645529 (works)
247 2.4.x patch which adds CHANGES: https://emptyhammock.com/media/downloads/r1645529-to-2.4.x.txt
249 ylavic: there may be missing bits, see thread for commit r1736510.
251 *) core: Drop an invalid Last-Modified header value coming
252 from a (F)CGI script instead of replacing it with Unix epoch.
253 Warn the users about Last-Modified header value replacements
254 and violations of the RFC.
255 trunk patch: http://svn.apache.org/r1748379
256 http://svn.apache.org/r1750747
257 http://svn.apache.org/r1750749
258 http://svn.apache.org/r1750953
259 http://svn.apache.org/r1751138
260 http://svn.apache.org/r1751139
261 http://svn.apache.org/r1751147
262 http://svn.apache.org/r1757818
263 2.4.x: trunk patches work, final view:
264 http://home.apache.org/~elukey/httpd-2.4.x-core-last_modified_tz_logging.patch
265 The problem has been discussed in dev@ extensively but we did not reach a common
266 agreement about how to proceed in the long term. While we wait, I would really like
267 to introduce useful logs for the users (the starting point of this change was a users@
268 email thread). If this is not the right way to go I will move the patch to other
269 sections of STATUS (stalled or being worked).
270 The code has been tested with a simple PHP script returning different Last-Modified
271 headers (GMT now, GMT now Europe/Paris, GMT tomorrow, GMT yesterday, PST now).
274 *) http: Don't remove the Content-Length of zero from a HEAD response if
275 it comes from an origin server, module or script. Allow the previous
276 behaviour (for legacy/buggy modules only, not origin) by also backporting
277 the HttpContentLengthHeadZero directive (and also HttpExpectStrict which
278 comes for free with the same commit).
279 trunk patch: http://svn.apache.org/r1554303
280 http://svn.apache.org/r1678215
281 2.4.x patch: http://people.apache.org/~ylavic/httpd-2.4.x-preserve_head_cl_zero.patch
283 ylavic: r1554303 issued a major MMN bump, but since the ABI change is two
284 ints added at the end of core_server_config, the proposed merge
285 does a minor bump only.
286 minfrin: Two new directives need to be documented.
288 * mod_proxy_http: Don't establish or reuse a backend connection before pre-
289 fetching the request body, so to minimize the delay between it is supposed
290 to be alive and the first bytes sent: this is a best effort to prevent the
291 backend from closing because of idle or keepalive timeout in the meantime.
292 Also, handle a new "proxy-flushall" environment variable which allows to
293 flush any forwarded body data immediately. PR 56541+37920.
294 trunk patch: http://svn.apache.org/r1656259
295 http://svn.apache.org/r1656359 (CHANGES entry)
296 2.4.x patch: trunk works (modulo CHANGES, docs/log-message-tags)
298 -0: jim: This seems to be a hit to normal performance, to handle an
299 error and/or non-normal condition. The pre-fetch is
300 expensive, and is always done, even before we know that
301 the backend is available to rec' it. I understand the
302 error described, but is the fix actually worth it (plus
303 it seems to allow for a DDoS vector).
304 ylavic: It seems to me that the problem is real since we reuse the
305 connection before prefetching 16K (either controlled by the
306 client, or by an input filter), we currently always prefetch
307 these bytes already. Regarding performance I don't see any
308 difference (more cycles) compared with the current code.
309 However I think I failed to rebuild the header_brigade when
310 the proxy loop is retried (ping), so I need to rework this.
311 Do you think we'd better remove the prefetch, or maybe just
312 make it nonblocking (by default)?
313 jim: Non-blocking seems the best way to handle...
315 * mod_dav: Allow other modules to become providers and add ACLs
316 to the DAV response. Requires a release of apr-util v1.6.
317 trunk patch: http://svn.apache.org/r1748322
318 2.4.x: trunk works modulo CHANGES/MMN
320 rpluem asks: Will this compile with apr-util < v1.6 and keep
321 mod_dav working (without the new features of the patch of course)?
322 I doubt that we will require apr-util 1.6 for the lifetime of 2.4.x
323 (see the discussion around ap_cstr_casecmp[n] an apr 1.6)
324 minfrin: Yes, as you can see in the patch everything applies only
325 if APR_XML_X2T_PARSED is defined, and the patch was tested with
326 both apr-util v1.6 and apr-util v1.5.
327 -1: jorton, breaks binary backwards compat per dev@ discuss
328 msgid <20160902120654.GA12674@redhat.com>
329 (& also, making the structure change with apr-util version
330 means it breaks binary compat across an apr-util upgrade?)
332 * Support PCRE2 (10.x) in place of PCRE (8.x).
333 Submitted by: wrowe, Petr Pisar [ppisar redhat.com]
335 http://svn.apache.org/r1773454
336 http://svn.apache.org/r1773741
337 http://svn.apache.org/r1773742
338 http://svn.apache.org/r1773839
339 http://svn.apache.org/r1773870
340 http://svn.apache.org/r1773882
341 wrowe notes that the current code is too inefficient, owing to the fact
342 that the ovector is a required allocation and is no longer allocated on
343 the stack, by design. The correct fix is an apr userdata allocation on
344 the appropriate pool, which would be thread-safe, but the actual API of
345 ap_regexec[_len]() offers us no pool. We cannot associate that pool with
346 the ap_regex_t, because a single regex may be used by many threads in
347 parallel and is not thread-safe beyond initialization.
348 So the only fix allowing us to use PCRE 10 in httpd 2.4 would be to write
349 this as a thread safe storage buffer for the majority of cases (<10 $args)
350 and we don't have a portable tls mechanism to do so.
353 PATCHES/ISSUES THAT ARE STALLED
355 * core: Add ap_errorlog_provider to make ErrorLog logging modular. This
356 backport keeps syslog logging as part of httpd core and only adds
357 API to allow other modules to be used for error logging.
358 trunk patch: http://svn.apache.org/r1525597
359 http://svn.apache.org/r1525664
360 http://svn.apache.org/r1525845
361 http://svn.apache.org/r1527003
362 http://svn.apache.org/r1527005
363 http://svn.apache.org/r1532344
364 http://svn.apache.org/r1539988
365 http://svn.apache.org/r1541029
366 http://svn.apache.org/r1543979
367 http://svn.apache.org/r1544156
368 http://svn.apache.org/r1626978
369 2.4.x patch: http://people.apache.org/~jkaluza/patches/httpd-2.4.x-errorlog_provider.patch
371 +1: covener w/ doc or code to fix syntax (providername:providerarg not supported like syslog or socacheproviders,
372 needs 2 args which is not valid in ErrorLog manual)
373 trawick: nit: fix "writing" in "/* NULL if we are writing to syslog */"
374 (sorry, haven't finished reviewing completely)
375 jim: What is the status of this??
377 * mod_proxy: Add ap_proxy_define_match_worker() and use it for ProxyPassMatch
378 and ProxyMatch section to distinguish between normal workers and workers
379 with regex substitutions in the name. Implement handling of such workers
380 in ap_proxy_get_worker(). Fixes the bug when regex workers were not
381 matched and used for request. PR 43513.
382 trunk patch: http://svn.apache.org/r1609680
383 http://svn.apache.org/r1609688
384 http://svn.apache.org/r1641381
385 ylavic: Merge patch provided (reusing new->real to avoid double de_socketfy() call).
386 Also added missing r1609688 to the patchset.
387 2.4.x patch: http://people.apache.org/~ylavic/httpd-2.4.x-ap_proxy_define_match_worker.patch
389 -0: covener tried to review this one in Austin with Jeff. Does the added match function
390 really cover a very narrow set of parameters with the way it skips over backreferences?
391 Also, why a new API vs. just setting the field inline?
393 * mod_systemd: New module, for integration with systemd on Linux.
394 trunk patch: http://svn.apache.org/r1393976
395 http://svn.apache.org/r1393997
396 http://svn.apache.org/r1484554
397 http://svn.apache.org/r1528032
398 http://svn.apache.org/r1528034
399 http://svn.apache.org/r1614821
400 http://svn.apache.org/r1618579
401 http://svn.apache.org/r1618588
402 2.4.x patch: http://people.apache.org/~jkaluza/patches/mod_systemd/httpd-2.4.x-mod_systemd.patch
404 sf comments: The IdleShutdown logic seems broken. Consider a single
405 active connection that is stalled for 10 seconds. That
406 connection will be broken after GracefulShutdownTimeout.
407 A better logic would be to check if there is any open
408 connection that is not in keep-alive state.
410 * mod_journald: Add new module mod_journald to log error logs into journald.
411 This patch needs changes done in mod_systemd patch (already
413 trunk patch: http://svn.apache.org/r1610339
414 http://svn.apache.org/r1621806
415 2.4.x patch: http://people.apache.org/~jkaluza/patches/httpd-2.4.x-mod_journald.patch
417 rjung, minfrin: Not understanding "This patch needs changes done in
418 mod_systemd patch", am I right in understanding this patch is
420 jkaluza: No, that patch is not committed yet. It is in STALLED section.
421 The link for that patch is: http://people.apache.org/~jkaluza/patches/mod_systemd/httpd-2.4.x-mod_systemd.patch
423 * core: Add support for systemd socket activation.
424 trunk patch: http://svn.apache.org/r1511033
425 http://svn.apache.org/r1608686
426 http://svn.apache.org/r1608694
427 http://svn.apache.org/r1608703
428 http://svn.apache.org/r1608721
429 http://svn.apache.org/r1608744
430 2.4.x patch: http://people.apache.org/~jkaluza/patches/mod_systemd/httpd-2.4.x-socket-activation.patch
433 * mod_proxy: Ensure network errors detected by the proxy are returned as
434 504 Gateway Timeout as opposed to 502 Bad Gateway
435 trunk patch: https://svn.apache.org/viewvc?view=revision&revision=1480058
436 2.4.x patch: trunk patch works modulo CHANGES
438 -1: rpluem: This change is still disputed. See
439 http://mail-archives.apache.org/mod_mbox/httpd-dev/201305.mbox/%3C1B16B9E3-87BA-4EEF-939C-7C7313B54714%40gbiv.com%3E
441 * cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will be
442 compiled by the build compiler instead of the host compiler.
443 Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
444 Trunk patches: http://svn.apache.org/viewvc?view=revision&revision=1327907
445 http://svn.apache.org/viewvc?view=revision&revision=1328390
446 http://svn.apache.org/viewvc?view=revision&revision=1328714
447 2.4 patch: http://people.apache.org/~fuankg/diffs/httpd-2.4.x-cross_compile.diff
448 fuankg: on hold until we agree for a better and more simple solution ...
450 * Makefile.win: Added copying of .vbs / .wsf CGIs to Windows install target.
451 Moved fixing of shebang to separate target so that it is
452 no longer executed by default and all CGIs remain inactive.
453 trunk patch: http://svn.apache.org/viewvc?view=revision&revision=1387984
454 http://svn.apache.org/viewvc?view=revision&revision=1421203
455 http://svn.apache.org/viewvc?view=revision&revision=1421591
456 2.4.x patch: http://people.apache.org/~fuankg/diffs/httpd-2.4.x-Makefile.win.diff
459 This commit is essentially deciding that an httpd install on
460 Windows now has printenv/testcgi written in 2 more languages.
461 To the extent that the usefulness is that it shows how to make scripts
462 of these types executable by httpd, I believe that the documentation
463 is the proper place to solve that. To the extent that the usefullness
464 is to show how to implement a CGI in these particular languages, I believe
465 that the httpd distribution and documentation in general is not the
466 place for that. Historically these types of scripts have caused problems
467 for downstream vendorsas well as newbies (and sometimes the intersection
468 of those two groups) who don't understand that these are information leaks
469 once they are enabled, and the subtlety of the way they are disabled ("Apache
470 messed up the first line; let me fix that") contributes to that.
471 fuankg notes: I've just added a big warning to all CGI scripts which should now
472 make absolutely clear that these CGIs are for testing purpose only - so those
473 who enable those scripts with inserting the right shebang should be 100% aware
474 of any risks (this should cover your last point).
475 jim: trawick, does the above address your concerns?
476 trawick: to some extent (somebody reading the script gets an idea)
477 Why isn't the configuration requirement documented instead
478 of described indirectly in a sample?
479 Why are these new samples added to the install without three
480 votes? (I didn't veto it; put your name next to the two
481 existing ones and I'll be satisfied that enough people
482 considered this addition as an appropriate solution for a
483 real httpd usability problem.)
484 wrowe: I'd agree with trawick, and suggest that these scripts can begin
485 their life somewhere in the manual/ tree. This really seems like
486 the place where /usr/share/httpd/examples/ would be useful, but
487 there isn't an ordinary directory for that. Since we want none
488 of the scripts to function 'out of the box', what about a new
489 cgi-examples/ dir alongside cgi-bin/? Otherwise manual/cgi/examples
492 * core: block Define and Undefine in vhost and directory context. Because
493 it is EXEC_ON_READ, it "breaks out" of these contexts anyway.
494 trunk patch: http://svn.apache.org/r1656063
495 http://svn.apache.org/r1656122
496 2.4.x patch: http://people.apache.org/~covener/patches/2.4.x-define-limits.diff
497 +1: covener (I need to review the docs manually in this area)
498 -1: wrowe (blocking will break "working" .conf files on a subversion update
499 meant to pick up security fixes. "Alerting" I would agree to.)