Merge r1418761, r1418765, r1510295, r1757147, r1805163, r1818924, r1827374, r1831772...

Merge r1418761, r1418765, r1510295, r1757147, r1805163, r1818924, r1827374, r1831772, r1832351, r1832951, r1815004 from trunk:

Don't claim "BIO dump follows" if it is not logged due to log level config.

make ssl_io_data_dump respect per-conn loglevel

add high trace level log messages for debugging buffering and write completion

* modules/ssl/ssl_engine_kernel.c (ssl_callback_SessionTicket): Fail
  if RAND_bytes() fails; possible per API, although not in practice
  with the OpenSSL implementation.

Fix typo in log message.

ap_add_common_vars(): use apr_pstrmemdup().

This avoids a transient replacement/restore of '?' by '\0' in r->filename.

Use 'ap_request_has_body()' instead of duplicating its implemenation.

The logic in 'ap_request_has_body()' is:
    has_body = (!r->header_only
                && (r->kept_body
                    || apr_table_get(r->headers_in, "Transfer-Encoding")
                    || ( (cls = apr_table_get(r->headers_in, "Content-Length"))
                        && (apr_strtoff(&cl, cls, &estr, 10) == APR_SUCCESS)
                        && (!*estr)
                        && (cl > 0) )
                    )
                );
So the test is slighly different from the original code. (but this looks fine to me)

This also has the advantage to avoid a redundant call to 'apr_table_get()' and to improve readability.

While at it, move the test '!r->expecting_100' a few lines above because it is cheap.

PR62368: Print the unparsed URI in AH03454

... to include r->args and get otherwise get as close to possible to
what came in over the wire.

Submitted By: Hank Ibell <hwibell gmail.com>
Committed By: covener

All error handling paths of this function call 'apr_brigade_destroy()' , except this one.
So add it here too.

Probably spotted with the help of the Coccinelle software (Thx Julia for the patch and for Coccinelle)

See PR 53016

* modules/proxy/proxy_util.c (ap_proxy_share_worker): Skip creating subpool
  for debugging unless debug-level logging is enabled.  No functional change.

mod_watchdog: Correct some log messages and fix
compiler warning
"'rv' may be used uninitialized in this function".

Follow up to r1722154.

Submitted by: sf, jorton, jorton, ylavic, jailletc36, covener, jailletc36, jorton, rjung
Reviewed by: jailletc36, jim, jorton

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1838103 13f79535-47bb-0310-9956-ffa450edef68