]>
granicus.if.org Git - curl/log
Dan Fandrich [Thu, 17 Oct 2019 08:24:28 +0000 (10:24 +0200)]
travis: Add an ARM64 build
TESTING
Jay Satiro [Tue, 15 Oct 2019 19:12:31 +0000 (15:12 -0400)]
CURLOPT_TIMEOUT.3: Clarify transfer timeout time includes queue time
Prior to this change some users did not understand that the "request"
starts when the handle is added to the multi handle, or probably they
did not understand that some of those transfers may be queued and that
time is included in timeout.
Reported-by: Jeroen Ooms
Fixes https://github.com/curl/curl/issues/4486
Closes https://github.com/curl/curl/pull/4489
Stian Soiland-Reyes [Wed, 16 Oct 2019 13:35:56 +0000 (14:35 +0100)]
tool_operate: Fix retry sleep time shown to user when Retry-After
- If server header Retry-After is being used for retry sleep time then
show that value to the user instead of the normal retry sleep time.
This is a follow-up to
640b973 (7.66.0) which changed curl tool so that
the value from Retry-After header overrides other retry timing options.
Closes https://github.com/curl/curl/pull/4498
Daniel Stenberg [Wed, 16 Oct 2019 07:57:33 +0000 (09:57 +0200)]
url: normalize CURLINFO_EFFECTIVE_URL
The URL extracted with CURLINFO_EFFECTIVE_URL was returned as given as
input in most cases, which made it not get a scheme prefixed like before
if the URL was given without one, and it didn't remove dotdot sequences
etc.
Added test case 1907 to verify that this now works as intended and as
before 7.62.0.
Regression introduced in 7.62.0
Reported-by: Christophe Dervieux
Fixes #4491
Closes #4493
Marcel Raad [Tue, 15 Oct 2019 21:37:20 +0000 (23:37 +0200)]
tests: line ending fixes for Windows
Mark some files as text.
Closes https://github.com/curl/curl/pull/4490
Marcel Raad [Mon, 14 Oct 2019 20:29:19 +0000 (22:29 +0200)]
tests: use proxy feature
This makes the tests succeed when using --disable-proxy.
Closes https://github.com/curl/curl/pull/4488
Marcel Raad [Sun, 13 Oct 2019 19:35:56 +0000 (21:35 +0200)]
smbserver: fix Python 3 compatibility
Python 2's `ConfigParser` module is spelled `configparser` in Python 3.
Closes https://github.com/curl/curl/pull/4484
Marcel Raad [Sun, 13 Oct 2019 17:14:39 +0000 (19:14 +0200)]
security: silence conversion warning
With MinGW-w64, `curl_socket_t` is is a 32 or 64 bit unsigned integer,
while `read` expects a 32 bit signed integer.
Use `sread` instead of `read` to use the correct parameter type.
Closes https://github.com/curl/curl/pull/4483
Marcel Raad [Sun, 13 Oct 2019 09:13:34 +0000 (11:13 +0200)]
connect: silence sign-compare warning
With MinGW-w64 using WinSock, `curl_socklen_t` is signed, while the
result of `sizeof` is unsigned.
Closes https://github.com/curl/curl/pull/4483
Daniel Stenberg [Sun, 13 Oct 2019 09:57:56 +0000 (11:57 +0200)]
TODO: Handle growing SFTP files
Closes #4344
Daniel Stenberg [Sun, 13 Oct 2019 09:35:57 +0000 (11:35 +0200)]
KNOWN_BUGS: remove "CURLFORM_CONTENTLEN in an array"
The curl_formadd() function is deprecated and shouldn't be used so the
real fix for applications is to switch to the curl_mime_* API.
Daniel Stenberg [Sat, 12 Oct 2019 20:45:13 +0000 (22:45 +0200)]
KNOWN_BUGS: "LDAP on Windows does authentication wrong"
Closes #3116
Daniel Stenberg [Sat, 12 Oct 2019 14:33:30 +0000 (16:33 +0200)]
appveyor: add a winbuild that uses VS2017
Closes #4482
Harry Sintonen [Thu, 10 Oct 2019 09:52:51 +0000 (12:52 +0300)]
socketpair: fix include and define for older TCP header systems
fixed build for systems that need netinet/in.h for IPPROTO_TCP and are
missing INADDR_LOOPBACK
Closes #4480
Daniel Stenberg [Thu, 10 Oct 2019 09:18:21 +0000 (11:18 +0200)]
socketpair: fix double-close in error case
Follow-up to
bc2dbef0afc08
Daniel Stenberg [Mon, 7 Oct 2019 06:25:53 +0000 (08:25 +0200)]
gskit: use the generic Curl_socketpair
Daniel Stenberg [Sat, 5 Oct 2019 13:41:09 +0000 (15:41 +0200)]
asyn-thread: make use of Curl_socketpair() where available
Daniel Stenberg [Fri, 4 Oct 2019 21:59:29 +0000 (23:59 +0200)]
socketpair: an implemention for Windows and more
Curl_socketpair() is designed to be used and work everywhere if there's
no native version or the native version isn't good enough.
Closes #4466
Daniel Stenberg [Wed, 9 Oct 2019 12:24:52 +0000 (14:24 +0200)]
RELEASE-NOTES: synced
Daniel Stenberg [Fri, 4 Oct 2019 11:29:04 +0000 (13:29 +0200)]
connect: return CURLE_OPERATION_TIMEDOUT for errno == ETIMEDOUT
Previosly all connect() failures would return CURLE_COULDNT_CONNECT, no
matter what errno said.
This makes for example --retry work on these transfer failures.
Reported-by: Nathaniel J. Smith
Fixes #4461
Clsoes #4462
Daniel Stenberg [Wed, 9 Oct 2019 07:20:29 +0000 (09:20 +0200)]
cirrus: switch off blackhole status on the freebsd CI machines
Daniel Stenberg [Tue, 8 Oct 2019 08:11:35 +0000 (10:11 +0200)]
tests: use port 2 instead of 60000 for a safer non-listening port
... when the tests want "connection refused".
Daniel Stenberg [Wed, 9 Oct 2019 11:05:32 +0000 (13:05 +0200)]
KNOWN_BUGS: IDN tests failing on Windows
Closes #3747
Dan Fandrich [Wed, 9 Oct 2019 08:55:06 +0000 (10:55 +0200)]
cirrus: Increase the git clone depth.
If more commits are submitted to master between the time of triggering
the first Cirrus build and the time the final build gets started, the
desired commit is no longer at HEAD and the build will error out.
[skip ci]
Daniel Stenberg [Wed, 9 Oct 2019 08:10:05 +0000 (10:10 +0200)]
docs: make sure the --no-progress-meter docs file is in dist too
Daniel Stenberg [Tue, 8 Oct 2019 21:05:35 +0000 (23:05 +0200)]
docs: document it as --no-progress-meter instead of the reverse
Follow-up to
93373a960c3bb4
Reported-by: infinnovation-dev on github
Fixes #4474
Closes #4475
Dan Fandrich [Tue, 8 Oct 2019 09:14:38 +0000 (11:14 +0200)]
cirrus: Switch the FreeBSD 11.x build to 11.3 and add a 13.0 build.
Also, select the images using image_family to get the latest snapshots
automatically.
[skip ci]
Daniel Stenberg [Mon, 7 Oct 2019 12:54:35 +0000 (14:54 +0200)]
curl: --no-progress-meter
New option that allows a user to ONLY switch off curl's progress meter
and leave everything else in "talkative" mode.
Reported-by: Piotr Komborski
Fixes #4422
Closes #4470
Daniel Stenberg [Tue, 8 Oct 2019 18:45:02 +0000 (20:45 +0200)]
TODO: Consult %APPDATA% also for .netrc
Closes #4016
Daniel Stenberg [Mon, 7 Oct 2019 12:22:23 +0000 (14:22 +0200)]
CURLOPT_TIMEOUT.3: remove the mention of "minutes"
... just say that limiting operations risk aborting otherwise fine
working transfers. If that means seconds, minutes or hours, we leave to
the user.
Reported-by: Martin Gartner
Closes #4469
Andrei Valeriu BICA [Mon, 7 Oct 2019 13:19:02 +0000 (16:19 +0300)]
docs: added multi-event.c example
Similar to multi-uv.c but using libevent 2. This is a simpler libevent
integration example then hiperfifo.c.
Closes #4471
Nicolas [Sat, 5 Oct 2019 01:49:43 +0000 (22:49 -0300)]
ldap: fix OOM error on missing query string
- Allow missing queries, don't return NO_MEMORY error in such a case.
It is acceptable for there to be no specified query string, for example:
curl ldap://ldap.forumsys.com
A regression bug in
1b443a7 caused this issue.
This is a partial fix for #4261.
Bug: https://github.com/curl/curl/issues/4261#issuecomment-
525543077
Reported-by: Jojojov@users.noreply.github.com
Analyzed-by: Samuel Surtees
Closes https://github.com/curl/curl/pull/4467
Paul B. Omta [Fri, 4 Oct 2019 07:55:54 +0000 (09:55 +0200)]
build: Remove unused HAVE_LIBSSL and HAVE_LIBCRYPTO defines
Closes https://github.com/curl/curl/pull/4460
Daniel Stenberg [Sat, 5 Oct 2019 09:46:48 +0000 (11:46 +0200)]
RELEASE-NOTES: synced
Stian Soiland-Reyes [Fri, 4 Oct 2019 15:18:23 +0000 (16:18 +0100)]
curl: ensure HTTP 429 triggers --retry
This completes #3794.
Also make sure the new tests from #4195 are enabled
Closes #4465
apique [Mon, 9 Sep 2019 15:06:15 +0000 (17:06 +0200)]
winbuild: add ENABLE_UNICODE option
Fixes https://github.com/curl/curl/issues/4308
Closes https://github.com/curl/curl/pull/4309
Daniel Stenberg [Thu, 3 Oct 2019 21:08:45 +0000 (23:08 +0200)]
ngtcp2: adapt to API change
Closes #4457
Daniel Stenberg [Thu, 3 Oct 2019 12:29:57 +0000 (14:29 +0200)]
cookies: change argument type for Curl_flush_cookies
The second argument is really a 'bool' so use that and pass in TRUE/FALSE
to make it clear.
Closes #4455
Daniel Stenberg [Mon, 30 Sep 2019 07:30:58 +0000 (09:30 +0200)]
http2: move state-init from creation to pre-transfer
To make sure that the HTTP/2 state is initialized correctly for
duplicated handles. It would otherwise easily generate "spurious"
PRIORITY frames to get sent over HTTP/2 connections when duplicated easy
handles were used.
Reported-by: Daniel Silverstone
Fixes #4303
Closes #4442
Daniel Stenberg [Thu, 3 Oct 2019 11:24:43 +0000 (13:24 +0200)]
urlapi: fix use-after-free bug
Follow-up from
2c20109a9b5d04
Added test 663 to verify.
Reported by OSS-Fuzz
Bug: https://crbug.com/oss-fuzz/17954
Closes #4453
Paul Dreik [Thu, 3 Oct 2019 08:57:09 +0000 (10:57 +0200)]
cookie: avoid harmless use after free
This fix removes a use after free which can be triggered by
the internal cookie fuzzer, but otherwise is probably
impossible to trigger from an ordinary application.
The following program reproduces it:
curl_global_init(CURL_GLOBAL_DEFAULT);
CURL* handle=curl_easy_init();
CookieInfo* info=Curl_cookie_init(handle,NULL,NULL,false);
curl_easy_setopt(handle, CURLOPT_COOKIEJAR, "/dev/null");
Curl_flush_cookies(handle, true);
Curl_cookie_cleanup(info);
curl_easy_cleanup(handle);
curl_global_cleanup();
This was found through fuzzing.
Closes #4454
Denis Chaplygin [Tue, 1 Oct 2019 07:55:08 +0000 (10:55 +0300)]
docs: add note on failed handles not being counted by curl_multi_perform
Closes #4446
Daniel Stenberg [Thu, 3 Oct 2019 12:16:10 +0000 (14:16 +0200)]
CURLMOPT_MAX_CONCURRENT_STREAMS.3: fix SEE ALSO typo
Niall [Tue, 4 Jun 2019 14:53:02 +0000 (15:53 +0100)]
ESNI: initial build/setup
Closes #4011
Daniel Stenberg [Wed, 2 Oct 2019 06:04:07 +0000 (08:04 +0200)]
RELEASE-NOTES: synced
Daniel Stenberg [Tue, 1 Oct 2019 07:54:21 +0000 (09:54 +0200)]
redirect: when following redirects to an absolute URL, URL encode it
... to make it handle for example (RFC violating) embeded spaces.
Reported-by: momala454 on github
Fixes #4445
Closes #4447
Daniel Stenberg [Tue, 1 Oct 2019 07:53:28 +0000 (09:53 +0200)]
urlapi: fix URL encoding when setting a full URL
Daniel Stenberg [Mon, 30 Sep 2019 21:24:49 +0000 (23:24 +0200)]
tool_operate: rename functions to make more sense
Daniel Stenberg [Mon, 23 Sep 2019 15:11:22 +0000 (17:11 +0200)]
curl: create easy handles on-demand and not ahead of time
This should again enable crazy-large download ranges of the style
[1-
10000000 ] that otherwise easily ran out of memory starting in 7.66.0
when this new handle allocating scheme was introduced.
Reported-by: Peter Sumatra
Fixes #4393
Closes #4438
Kunal Ekawde [Tue, 24 Sep 2019 12:56:11 +0000 (08:56 -0400)]
CURLMOPT_MAX_CONCURRENT_STREAMS: new setopt
Closes #4410
Daniel Stenberg [Tue, 1 Oct 2019 13:40:05 +0000 (15:40 +0200)]
chunked-encoding: stop hiding the CURLE_BAD_CONTENT_ENCODING error
Unknown content-encoding would get returned as CURLE_WRITE_ERROR if the
response is chunked-encoded.
Reported-by: Ilya Kosarev
Fixes #4310
Closes #4449
Marcel Raad [Mon, 30 Sep 2019 22:32:26 +0000 (00:32 +0200)]
checksrc: fix uninitialized variable warning
The loop doesn't need to be executed without a file argument.
Closes https://github.com/curl/curl/pull/4444
Marcel Raad [Mon, 30 Sep 2019 22:26:03 +0000 (00:26 +0200)]
urlapi: fix unused variable warning
`dest` is only used with `ENABLE_IPV6`.
Closes https://github.com/curl/curl/pull/4444
Marcel Raad [Mon, 30 Sep 2019 22:24:50 +0000 (00:24 +0200)]
lib: silence conversion warnings
Closes https://github.com/curl/curl/pull/4444
Marcel Raad [Tue, 24 Sep 2019 17:26:51 +0000 (19:26 +0200)]
AppVeyor: add 32-bit MinGW-w64 build
With WinSSL and testing enabled so that it would have detected most of
the warnings fixed in [0] and [1].
[0] https://github.com/curl/curl/pull/4398
[1] https://github.com/curl/curl/pull/4415
Closes https://github.com/curl/curl/pull/4433
Marcel Raad [Tue, 24 Sep 2019 17:15:10 +0000 (19:15 +0200)]
AppVeyor: remove MSYS2_ARG_CONV_EXCL for winbuild
It's only used for MSYS2 with MinGW.
Closes
Emil Engler [Mon, 30 Sep 2019 15:00:45 +0000 (17:00 +0200)]
git: add tests/server/disabled to .gitignore
Closes #4441
Daniel Stenberg [Mon, 30 Sep 2019 08:29:46 +0000 (10:29 +0200)]
altsvc: accept quoted ma and persist values
As mandated by the spec. Test 1654 is extended to verify.
Closes #4443
Daniel Stenberg [Mon, 30 Sep 2019 09:42:32 +0000 (11:42 +0200)]
mailmap: a Lucas fix
lucas [Fri, 27 Sep 2019 11:31:13 +0000 (12:31 +0100)]
quiche: update HTTP/3 config creation to new API
Daniel Stenberg [Sun, 29 Sep 2019 10:34:07 +0000 (12:34 +0200)]
BINDINGS: PureBasic, Net::Curl for perl and Nim
Daniel Stenberg [Sun, 29 Sep 2019 09:57:24 +0000 (11:57 +0200)]
BINDINGS: Kapito is an Erlang library, basically a binding
Daniel Stenberg [Sun, 29 Sep 2019 09:37:37 +0000 (11:37 +0200)]
BINDINGS: added clj-curl
Reported-by: Lucas Severo
Jay Satiro [Wed, 25 Sep 2019 23:12:27 +0000 (19:12 -0400)]
docs: disambiguate CURLUPART_HOST is for host name (ie no port)
Closes #4424
Daniel Stenberg [Fri, 27 Sep 2019 07:41:43 +0000 (09:41 +0200)]
cookies: using a share with cookies shouldn't enable the cookie engine
The 'share object' only sets the storage area for cookies. The "cookie
engine" still needs to be enabled or activated using the normal cookie
options.
This caused the curl command line tool to accidentally use cookies
without having been told to, since curl switched to using shared cookies
in 7.66.0.
Test 1166 verifies
Updated test 506
Fixes #4429
Closes #4434
Daniel Stenberg [Fri, 27 Sep 2019 13:10:49 +0000 (15:10 +0200)]
setopt: handle ALTSVC set to NULL
Daniel Stenberg [Fri, 27 Sep 2019 11:56:08 +0000 (13:56 +0200)]
RELEASE-NOTES: synced
grdowns [Fri, 27 Sep 2019 09:37:29 +0000 (02:37 -0700)]
INSTALL: add vcpkg installation instructions
Closes #4435
Zenju [Tue, 24 Sep 2019 17:58:35 +0000 (19:58 +0200)]
FTP: add test for FTPFILE_NOCWD: Avoid redundant CWDs
Add libtest 661
Closes #4417
Zenju [Wed, 25 Sep 2019 15:48:53 +0000 (17:48 +0200)]
FTP: url-decode path before evaluation
Closes #4428
Marcel Raad [Tue, 24 Sep 2019 16:58:23 +0000 (18:58 +0200)]
tests: fix narrowing conversion warnings
`timediff_t` is 64 bits wide also on 32-bit systems since
commit
b1616dad8f0 .
Closes https://github.com/curl/curl/pull/4415
julian [Thu, 26 Sep 2019 01:24:01 +0000 (18:24 -0700)]
vtls: Fix comment typo about macosx-version-min compiler flag
Closes https://github.com/curl/curl/pull/4425
Yechiel Kalmenson [Thu, 26 Sep 2019 19:37:24 +0000 (15:37 -0400)]
README: minor grammar fix
Closes #4431
Spezifant [Thu, 26 Sep 2019 18:45:14 +0000 (20:45 +0200)]
HTTP3: fix prefix parameter for ngtcp2 build
Closes #4430
Daniel Stenberg [Thu, 26 Sep 2019 14:06:11 +0000 (16:06 +0200)]
quiche: don't close connection at end of stream!
Daniel Stenberg [Thu, 26 Sep 2019 13:45:58 +0000 (15:45 +0200)]
quiche: set 'drain' when returning without having drained the queues
Daniel Stenberg [Thu, 26 Sep 2019 12:52:30 +0000 (14:52 +0200)]
Revert "FTP: url-decode path before evaluation"
This reverts commit
2f036a72d543e96128bd75cb0fedd88815fd42e2 .
Daniel Stenberg [Thu, 26 Sep 2019 12:17:09 +0000 (14:17 +0200)]
HTTP3: merged and simplified the two 'running' sections
Daniel Stenberg [Thu, 26 Sep 2019 12:12:16 +0000 (14:12 +0200)]
HTTP3: show an --alt-svc using example too
Zenju [Wed, 25 Sep 2019 15:48:53 +0000 (17:48 +0200)]
FTP: url-decode path before evaluation
Closes #4423
Daniel Stenberg [Tue, 24 Sep 2019 12:03:23 +0000 (14:03 +0200)]
openssl: use strerror on SSL_ERROR_SYSCALL
Instead of showing the somewhat nonsensical errno number, use strerror()
to provide a more relatable error message.
Closes #4411
Daniel Stenberg [Thu, 26 Sep 2019 11:18:17 +0000 (13:18 +0200)]
HTTP3: update quic.aiortc.org + add link to server list
Reported-by: Jeremy Lainé
Jay Satiro [Fri, 12 Apr 2019 22:57:53 +0000 (18:57 -0400)]
url: don't set appconnect time for non-ssl/non-ssh connections
Prior to this change non-ssl/non-ssh connections that were reused set
TIMER_APPCONNECT [1]. Arguably that was incorrect since no SSL/SSH
handshake took place.
[1]: TIMER_APPCONNECT is publicly known as CURLINFO_APPCONNECT_TIME in
libcurl and %{time_appconnect} in the curl tool. It is documented as
"the time until the SSL/SSH handshake is completed".
Reported-by: Marcel Hernandez
Ref: https://github.com/curl/curl/issues/3760
Closes https://github.com/curl/curl/pull/3773
Daniel Stenberg [Wed, 25 Sep 2019 10:27:26 +0000 (12:27 +0200)]
ngtcp2: remove fprintf() calls
- convert some of them to H3BUF() calls to infof()
- remove some of them completely
- made DEBUG_HTTP3 defined only if CURLDEBUG is set for now
Closes #4421
Jay Satiro [Wed, 25 Sep 2019 12:35:02 +0000 (14:35 +0200)]
url: fix the NULL hostname compiler warning case
Closes #4403
Jay Satiro [Wed, 25 Sep 2019 12:34:31 +0000 (14:34 +0200)]
travis: move the go install to linux-only
... to repair the build again
Closes #4403
Daniel Stenberg [Wed, 25 Sep 2019 10:13:43 +0000 (12:13 +0200)]
altsvc: correct the #ifdef for the ngtcp2 backend
Daniel Stenberg [Wed, 25 Sep 2019 10:06:20 +0000 (12:06 +0200)]
altsvc: save h3 as h3-23
Follow-up to
d176a2c7e5
Daniel Stenberg [Tue, 24 Sep 2019 12:45:27 +0000 (14:45 +0200)]
urlapi: question mark within fragment is still fragment
The parser would check for a query part before fragment, which caused it
to do wrong when the fragment contains a question mark.
Extended test 1560 to verify.
Reported-by: Alex Konev
Fixes #4412
Closes #4413
Alex Samorukov [Mon, 23 Sep 2019 18:56:48 +0000 (20:56 +0200)]
HTTP3.md: move -p for mkdir, remove -j for make
- mkdir on OSX/Darwin requires `-p` argument before dir
- portabbly figuring out number of cores is an exercise for somewhere
else
Closes #4407
Patrick Monnerat [Sun, 11 Aug 2019 15:22:45 +0000 (17:22 +0200)]
os400: getpeername() and getsockname() return ebcdic AF_UNIX sockaddr,
As libcurl now uses these 2 system functions, wrappers are needed on os400
to convert returned AF_UNIX sockaddrs to ascii.
This is a follow-up to commit
7fb54ef .
See also #4037.
Closes #4214
Lucas Pardue [Tue, 24 Sep 2019 05:27:33 +0000 (01:27 -0400)]
strcase: fix raw lowercasing the letter X
Casing mistake in Curl_raw_tolower 'X' wasn't lowercased as 'x' prior to
this change.
Follow-up to
0023fce which added the function several days ago.
Ref: https://github.com/curl/curl/pull/4401#discussion_r327396546
Closes https://github.com/curl/curl/pull/4408
Daniel Stenberg [Mon, 23 Sep 2019 09:05:37 +0000 (11:05 +0200)]
http2: Expression 'stream->stream_id != - 1' is always true
PVS-Studio warning
Fixes #4402
Daniel Stenberg [Mon, 23 Sep 2019 09:04:13 +0000 (11:04 +0200)]
http2: A value is being subtracted from the unsigned variable
PVS-Studio warning
Fixes #4402
Daniel Stenberg [Mon, 23 Sep 2019 08:55:43 +0000 (10:55 +0200)]
libssh: part of conditional expression is always true: !result
PVS-Studio warning
Fixed #4402
Daniel Stenberg [Mon, 23 Sep 2019 08:55:05 +0000 (10:55 +0200)]
libssh: part of conditional expression is always true
PVS-Studio warning
Fixes #4402
Daniel Stenberg [Mon, 23 Sep 2019 08:54:03 +0000 (10:54 +0200)]
libssh: The expression is excessive or contains a misprint
PVS-Studio warning
Fixes #4402
Daniel Stenberg [Mon, 23 Sep 2019 08:51:00 +0000 (10:51 +0200)]
quiche: The expression must be surrounded by parentheses
PVS-Studio warning
Fixes #4402
Daniel Stenberg [Mon, 23 Sep 2019 08:48:06 +0000 (10:48 +0200)]
vauth: The parameter 'status' must be surrounded by parentheses
PVS-Studio warning
Fixes #4402
Paul Dreik [Mon, 23 Sep 2019 11:11:49 +0000 (13:11 +0200)]
doh: allow only http and https in debug mode
Otherwise curl may be told to use for instance pop3 to
communicate with the doh server, which most likely
is not what you want.
Found through fuzzing.
Closes #4406