fix Cygwin/MSYS compilation

_getpid is Windows API. On Cygwin variants it should remain getpid.

Fixes #8220
Closes #9255

GHA: prepare workflow merge by aligning structure again

Closes #9413

docs: the websockets symbols are added in 7.86.0

Nothing else

Closes #9459

tests/libtest/Makefile.inc: fixup merge conflict mistake

EXPERIMENTAL.md: add WebSockets

appveyor: enable websockets

cirrus: enable websockets in the windows builds

GHA: add websockets to macos, openssl3 and hyper builds

tests: add websockets tests

- add websockets support to sws
- 2300: first very basic websockets test
- 2301: first libcurl test for ws (not working yet)
- 2302: use the ws ca

tests: add websockets tests

- add websockets support to sws
- 2300: first very basic websockets test
- 2301: first libcurl test for ws (not working yet)
- 2302: use the ws callback
- 2303: test refused upgrade

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curl_ws_meta: initial implementation

curl_ws_meta.3: added docs

ws: initial websockets support

Closes #8995

version: add ws + wss

libtest/lib1560: test basic websocket URL parsing

configure: add --enable-websockets

docs/WebSockets.md: docs

test415: verify Content-Length parser with control code + negative value

strtoofft: after space, there cannot be a control code

With the change from ISSPACE() to ISBLANK() this function no longer
deals with (ignores) control codes the same way, which could le

strtoofft: after space, there cannot be a control code

With the change from ISSPACE() to ISBLANK() this function no longer
deals with (ignores) control codes the same way, which could lead to
this function returning unexpected values like in the case of
"Content-Length: \r-12354".

Follow-up to 6f9fb7ec2d7cb389a0da5

Detected by OSS-fuzz
Bug: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=51140
Assisted-by: Max Dymond
Closes #9458

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headers: reset the requests counter at transfer start

If not, reusing an easy handle to do a subsequent transfer would
continue the counter from the previous invoke, which then would mak

headers: reset the requests counter at transfer start

If not, reusing an easy handle to do a subsequent transfer would
continue the counter from the previous invoke, which then would make use
of the header API difficult/impossible as the request counter
mismatched.

Add libtest 1947 to verify.

Reported-by: Andrew Lambert
Fixes #9424
Closes #9447

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header: define public API functions as extern c

Prior to this change linker errors would occur if curl_easy_header or
curl_easy_nextheader was called from a C++ unit.

Bug: https

header: define public API functions as extern c

Prior to this change linker errors would occur if curl_easy_header or
curl_easy_nextheader was called from a C++ unit.

Bug: https://github.com/curl/curl/issues/9424#issuecomment-1238818007
Reported-by: Andrew Lambert

Closes https://github.com/curl/curl/pull/9446

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http2: make nghttp2 less picky about field whitespace

In nghttp2 1.49.0 it returns error on leading and trailing whitespace in
header fields according to language in the recently shipped

http2: make nghttp2 less picky about field whitespace

In nghttp2 1.49.0 it returns error on leading and trailing whitespace in
header fields according to language in the recently shipped RFC 9113.

nghttp2 1.50.0 introduces an option to switch off this strict check and
this change enables this option by default which should make curl behave
more similar to how it did with nghttp2 1.48.0 and earlier.

We might want to consider making this an option in the future.

Closes #9448

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RELEASE-NOTES: synced

And bump to 7.86.0 for the pending next release

ftp: ignore a 550 response to MDTM

The 550 is overused as a return code for multiple error case, e.g.
file not found and/or insufficient permissions to access the file.

So we ca

ftp: ignore a 550 response to MDTM

The 550 is overused as a return code for multiple error case, e.g.
file not found and/or insufficient permissions to access the file.

So we cannot fail hard in this case.

Adjust test 511 since we now fail later.
Add new test 3027 which check that when MDTM failed, but the file could
actually be retrieved, that in this case no filetime is provided.

Reported-by: Michael Heimpold
Fixes #9357
Closes #9387

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urlapi: leaner with fewer allocs

Slightly faster with more robust code. Uses fewer and smaller mallocs.

- remove two fields from the URL handle struct
- reduce copies and allocs

urlapi: leaner with fewer allocs

Slightly faster with more robust code. Uses fewer and smaller mallocs.

- remove two fields from the URL handle struct
- reduce copies and allocs
- use dynbuf buffers more instead of custom malloc + copies
- uses dynbuf to build the host name in reduces serial alloc+free within
the same function.
- move dedotdotify into urlapi.c and make it static, not strdup the input
and optimize it by checking for . and / before using strncmp
- remove a few strlen() calls
- add Curl_dyn_setlen() that can "trim" an existing dynbuf

Closes #9408

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setup-win32: no longer define UNICODE/_UNICODE implicitly

- If UNICODE or _UNICODE is defined but the other isn't then error
instead of implicitly defining it.

As Marcel point

setup-win32: no longer define UNICODE/_UNICODE implicitly

- If UNICODE or _UNICODE is defined but the other isn't then error
instead of implicitly defining it.

As Marcel pointed out it is too late at this point to make such a define
because Windows headers may already be included, so likely it never
worked. We never noticed because build systems that can make Windows
Unicode builds always define both. If one is defined but not the other
then something went wrong during the build configuration.

Bug: https://github.com/curl/curl/pull/9375#discussion_r956545272
Reported-by: Marcel Raad

Closes https://github.com/curl/curl/pull/9384

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