CURLOPT_POSTFIELDS.3: fix incorrect C string escape in example

- Escape inner quotes with two backslashes.

Two backslashes escapes the backslash for the man page and will show as

CURLOPT_POSTFIELDS.3: fix incorrect C string escape in example

- Escape inner quotes with two backslashes.

Two backslashes escapes the backslash for the man page and will show as
a single backslash.

eg: "{\\"name\\": \\"daniel\\"}" shows as "{\"name\": \"daniel\"}".

Closes https://github.com/curl/curl/pull/12588

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appveyor: tidy-ups

- replace two remaining backslashes with forward slashes.
- tidy up the way we form and pass `TFLAGS`.

Follow-up to 2d4d0c1fd32f5cc3f946c407c8eccd5477b287df #

appveyor: tidy-ups

- replace two remaining backslashes with forward slashes.
- tidy up the way we form and pass `TFLAGS`.

Follow-up to 2d4d0c1fd32f5cc3f946c407c8eccd5477b287df #12572

Closes #12582

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transfer: fix upload rate limiting, add test cases

- add test cases for rate limiting uploads for all
http versions
- fix transfer loop handling of limits. Signal a re-receive

transfer: fix upload rate limiting, add test cases

- add test cases for rate limiting uploads for all
http versions
- fix transfer loop handling of limits. Signal a re-receive
attempt only on exhausting maxloops without an EAGAIN
- fix `data->state.selectbits` forcing re-receive to also
set re-sending when transfer is doing this.

Reported-by: Karthikdasari0423 on github
Fixes #12559
Closes #12586

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mbedtls: free the entropy when threaded

The entropy_free was never done for threaded builds, causing a small
(fixed) memory leak.

Reported-by: RevaliQaQ on github
Fixes #125

mbedtls: free the entropy when threaded

The entropy_free was never done for threaded builds, causing a small
(fixed) memory leak.

Reported-by: RevaliQaQ on github
Fixes #12584
Closes #12585

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http2: improved on_stream_close/data_done handling

- there seems to be a code path that cleans up easy handles without
triggering DONE or DETACH events to the connection filters. This

http2: improved on_stream_close/data_done handling

- there seems to be a code path that cleans up easy handles without
triggering DONE or DETACH events to the connection filters. This
would explain wh nghttp2 still holds stream user data
- add GOOD check to easy handle used in on_close_callback to
prevent crashes, ASSERTs in debug builds.
- NULL the stream user data early before submitting RST
- add checks in on_stream_close() to identify UNGOOD easy handles

Reported-by: Hans-Christian Egtvedt
Fixes #10936
Closes #12562

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mprintf: overhaul and bugfixes

In a test case using lots of snprintf() calls using many commonly used
%-codes per call, this version is around 30% faster than previous
version.

mprintf: overhaul and bugfixes

In a test case using lots of snprintf() calls using many commonly used
%-codes per call, this version is around 30% faster than previous
version.

It also fixes the #12561 bug which made it not behave correctly when
given unknown %-sequences. Fixing that flaw required a different take on
the problem, which resulted in the new two-arrays model.

lib557: extended - Verify the #12561 fix and test more printf features

unit1398: fix test: It used a <num>$ only for one argument, which is not
supported.

Fixes #12561
Closes #12563

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appveyor: replace PowerShell with bash + parallel autotools

PowerShell works (after a steep development curve), but one property of
it stuck and kept causing unresolvable usability issue

appveyor: replace PowerShell with bash + parallel autotools

PowerShell works (after a steep development curve), but one property of
it stuck and kept causing unresolvable usability issues: With
`$ErrorActionPreference=Stop`, it does abort on failures, but shows only
the first line of the error message. In `Continue` mode, it shows the
full error message, but doesn't stop on all errors. Another issue is
PowerShell considering any stderr output as if the command failed (this
has been improved in 7.2 (2021-Nov), but fixed versions aren't running
in CI and will not be for a long time in all test images.)

Thus, we're going with bash.

Also:
- use `-j2` with autotools tests, making them finish 5-15 minutes per
job faster.
- omit `POSIX_PATH_PREFIX`.
- use `WINDIR`.
- prefer forward slashes.

Follow-up to: 75078a415d9c769419aed4153d3d525a8eba95af #11999
Ref: #12444

Fixes #12560
Closes #12572

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asyn-thread: use GetAddrInfoExW on >= Windows 8

For doing async DNS resolution instead of starting a thread for each
request.

Fixes #12481
Closes #12482

strerror: repair get_winsock_error()

It would try to read longer than the provided string and crash.

Follow-up to ff74cef5d4a0cf60106517a1c7384
Reported-by: calvin2021y on githu

strerror: repair get_winsock_error()

It would try to read longer than the provided string and crash.

Follow-up to ff74cef5d4a0cf60106517a1c7384
Reported-by: calvin2021y on github
Fixes #12578
Closes #12579

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CURLOPT_SSH_*_KEYFILE: clarify

Closes #12554

ngtcp2: put h3 at the front of alpn

Closes #12576

test460: verify a command line using --expand with no argument

This verifies the fix for #12565

tool_getparam: do not try to expand without an argument

This would lead to a segfault.

Fixes #12565
Reported-by: Geeknik Labs
Closes #12575

RELEASE-NOTES: synced

Bumped version to 8.6.0 because of changes

Makefile.am: fix the MSVC project generation

It made the vcxproj files not get included in dist tarballs.

Regression since 74423b5df4c8117891eb89 (8.5.0)

Reported-by: iAroc

Makefile.am: fix the MSVC project generation

It made the vcxproj files not get included in dist tarballs.

Regression since 74423b5df4c8117891eb89 (8.5.0)

Reported-by: iAroc on github
Fixes #12564
Closes #12567

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altsvc: free 'as' when returning error

Closes #12570

Signed-off-by: zengwei <zengwei1@uniontech.com>

build: fix `-Wconversion`/`-Wsign-conversion` warnings

Fix remaining warnings in examples and tests which are not suppressed
by the pragma in `lib/curl_setup.h`.

Silence a toolc

build: fix `-Wconversion`/`-Wsign-conversion` warnings

Fix remaining warnings in examples and tests which are not suppressed
by the pragma in `lib/curl_setup.h`.

Silence a toolchain issue causing warnings in `FD_SET()` calls with
older Cygwin/MSYS2 builds. Likely fixed on 2020-08-03 by:
https://cygwin.com/git/?p=newlib-cygwin.git;a=commitdiff;h=5717262b8ecfed0f7fab63e2c09c78991e36f9dd

Follow-up to 2dbe75bd7f3c36837aa06fd87a442bdf3fb7faef #12492

Closes #12557

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build: fix some `-Wsign-conversion`/`-Warith-conversion` warnings

- enable `-Wsign-conversion` warnings, but also setting them to not
raise errors.
- fix `-Warith-conversion` warni

build: fix some `-Wsign-conversion`/`-Warith-conversion` warnings

- enable `-Wsign-conversion` warnings, but also setting them to not
raise errors.
- fix `-Warith-conversion` warnings seen in CI.
These are triggered by `-Wsign-converion` and causing errors unless
explicitly silenced. It makes more sense to fix them, there just a few
of them.
- fix some `-Wsign-conversion` warnings.
- hide `-Wsign-conversion` warnings with a `#pragma`.
- add macro `CURL_WARN_SIGN_CONVERSION` to unhide them on a per-build
basis.
- update a CI job to unhide them with the above macro:
https://github.com/curl/curl/actions/workflows/linux.yml -> OpenSSL -O3

Closes #12492

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cmake: tidy-up `OtherTests.cmake`

- make more obvious which detection uses which prep steps.
- merge and streamline conditions.
- these should not alter detection results.

A

cmake: tidy-up `OtherTests.cmake`

- make more obvious which detection uses which prep steps.
- merge and streamline conditions.
- these should not alter detection results.

Also align log output messages from
`Macros.cmake` / `curl_internal_test` with rest of the build.

Closes #12551

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appveyor: switch to out-of-tree builds

With cmake and autotools.

Closes #12550

DEPRECATE.md: mention that NTLM_WB no longer works

Ref: #12479
Closes #12553

CURLOPT_SERVER_RESPONSE_TIMEOUT_MS: add

Proposed-by: Yifei Kong
Ref: https://curl.se/mail/lib-2023-11/0023.html
Closes #12369

build: more `-Wformat` fixes

- memdebug: update to not trigger `-Wformat-nonliteral` warnings.
- imap: mark `imap_sendf()` with `CURL_PRINTF()`.
- tool_msgs: mark static function wi

build: more `-Wformat` fixes

- memdebug: update to not trigger `-Wformat-nonliteral` warnings.
- imap: mark `imap_sendf()` with `CURL_PRINTF()`.
- tool_msgs: mark static function with `CURL_PRINTF()`.

Follow-up to 3829759bd042c03225ae862062560f568ba1a231 #12489

Closes #12540

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windows: delete redundant headers

`winsock2.h` pulls in `windows.h`. `ws2tcpip.h` pulls in `winsock2.h`.
`winsock2.h` and `ws2tcpip.h` are also pulled by `curl/curl.h`.

Keep onl

windows: delete redundant headers

`winsock2.h` pulls in `windows.h`. `ws2tcpip.h` pulls in `winsock2.h`.
`winsock2.h` and `ws2tcpip.h` are also pulled by `curl/curl.h`.

Keep only those headers that are not already included, or the code under
it uses something from that specific header.

Closes #12539

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cmake: prefill/cache `HAVE_STRUCT_SOCKADDR_STORAGE`

Also add missing include to `OtherTests.cmake`. It didn't cause an issue
because the parent already included this earlier by chance.

cmake: prefill/cache `HAVE_STRUCT_SOCKADDR_STORAGE`

Also add missing include to `OtherTests.cmake`. It didn't cause an issue
because the parent already included this earlier by chance.

Closes #12537

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