tidy-up: whitespace [ci skip]

mbedtls: fix pytest for newer versions

Fix the expectations in pytest for newer versions of mbedtls

Closes #13132

https-proxy: use IP address and cert with ip in alt names

- improve info logging when peer verification fails to indicate
if DNS name or ip address has been tried to match
- add te

https-proxy: use IP address and cert with ip in alt names

- improve info logging when peer verification fails to indicate
if DNS name or ip address has been tried to match
- add test case for contacting https proxy with ip address
- add pytest env check on loaded credentials and re-issue
when they are no longer valid
- disable proxy ip address test for bearssl, since not supported there

Ref: #12831
Closes #12838

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url: proxy ssl connection reuse fix

- tunnel https proxy used for http: transfers does
no check if proxy-ssl configuration matches
- test cases added, test_10_12 fails on 8.4.0

url: proxy ssl connection reuse fix

- tunnel https proxy used for http: transfers does
no check if proxy-ssl configuration matches
- test cases added, test_10_12 fails on 8.4.0

Closes #12255

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http2: polish things around POST

- added test cases for various code paths
- fixed handling of blocked write when stream had
been closed inbetween attempts
- re-enabled DEBUGAS

http2: polish things around POST

- added test cases for various code paths
- fixed handling of blocked write when stream had
been closed inbetween attempts
- re-enabled DEBUGASSERT on send with smaller data size

- in debug builds, environment variables can be set to simulate a slow
network when sending data. cf-socket.c and vquic.c support
* CURL_DBG_SOCK_WBLOCK: percentage of send() calls that should be
answered with a EAGAIN. TCP/UNIX sockets.
This is chosen randomly.
* CURL_DBG_SOCK_WPARTIAL: percentage of data that shall be written
to the network. TCP/UNIX sockets.
Example: 80 means a send with 1000 bytes would only send 800
This is applied to every send.
* CURL_DBG_QUIC_WBLOCK: percentage of send() calls that should be
answered with EAGAIN. QUIC only.
This is chosen randomly.

Closes #11756

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tidy-up: mostly whitespace nits

- delete completed TODO from `./CMakeLists.txt`.
- convert a C++ comment to C89 in `./CMake/CurlTests.c`.
- delete duplicate EOLs from EOF.
- add

tidy-up: mostly whitespace nits

- delete completed TODO from `./CMakeLists.txt`.
- convert a C++ comment to C89 in `./CMake/CurlTests.c`.
- delete duplicate EOLs from EOF.
- add missing EOL at EOF.
- delete whitespace at EOL (except from expected test results).
- convert tabs to spaces.
- convert CRLF EOLs to LF in GHA yaml.
- text casing fixes in `./CMakeLists.txt`.
- fix a codespell typo in `packages/OS400/initscript.sh`.

Closes #11772

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http2: h2 and h2-PROXY connection alive check fixes

- fix HTTP/2 check to not declare a connection dead when
the read attempt results in EAGAIN
- add H2-PROXY alive check as for HT

http2: h2 and h2-PROXY connection alive check fixes

- fix HTTP/2 check to not declare a connection dead when
the read attempt results in EAGAIN
- add H2-PROXY alive check as for HTTP/2 that was missing
and is needed
- add attach/detach around Curl_conn_is_alive() and remove
these in filter methods
- add checks for number of connections used in some test_10
proxy tunneling tests

Closes #11368

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http2: support HTTP/2 to forward proxies, non-tunneling

- with `--proxy-http2` allow h2 ALPN negotiation to
forward proxies
- applies to http: requests against a https: proxy only,

http2: support HTTP/2 to forward proxies, non-tunneling

- with `--proxy-http2` allow h2 ALPN negotiation to
forward proxies
- applies to http: requests against a https: proxy only,
as https: requests will auto-tunnel
- adding a HTTP/1 request parser in http1.c
- removed h2h3.c
- using new request parser in nghttp2 and all h3 backends
- adding test 2603 for request parser
- adding h2 proxy test cases to test_10_*

scorecard.py: request scoring accidentally always run curl
with '-v'. Removed that, expect double numbers.

labeller: added http1.* and h2-proxy sources to detection

Closes #10967

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proxy: http2 proxy tunnel implementation

- currently only on debug build and when env variable
CURL_PROXY_TUNNEL_H2 is present.
- will ALPN negotiate with the proxy server and swit

proxy: http2 proxy tunnel implementation

- currently only on debug build and when env variable
CURL_PROXY_TUNNEL_H2 is present.
- will ALPN negotiate with the proxy server and switch
tunnel filter based on the protocol negotiated.
- http/1.1 tunnel code moved into cf-h1-proxy.[ch]
- http/2 tunnel code implemented in cf-h2-proxy.[ch]
- tunnel start and ALPN set remains in http_proxy.c
- moving all haproxy related code into cf-haproxy.[ch]

VTLS changes
- SSL filters rely solely on the "alpn" specification they
are created with and no longer check conn->bits.tls_enable_alpn.
- checks on which ALPN specification to use (or none at all) are
done in vtls.c when creating the filter.

Testing
- added a nghttpx forward proxy to the pytest setup that
speaks HTTP/2 and forwards all requests to the Apache httpd
forward proxy server.
- extending test coverage in test_10 cases
- adding proxy tests for direct/tunnel h1/h2 use of basic auth.
- adding test for http/1.1 and h2 proxy tunneling to pytest

Closes #10780

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pytest: improvements for suitable curl and error output

- will check built curl for http and https support and
skip all tests if not there
- will dump stdout/stderr/trace output on

pytest: improvements for suitable curl and error output

- will check built curl for http and https support and
skip all tests if not there
- will dump stdout/stderr/trace output on errored responses

Closes #10829

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tests/http: remove year ranges from copyrights

Closes #10763

tests/http: add pytest to GHA and improve tests

- added to: ngtcp2-quictls, ngtcp2-gnutls and the linux varians
quiche, bearssl, libressl, mbedtls, openssl3, rustls
- added disable

tests/http: add pytest to GHA and improve tests

- added to: ngtcp2-quictls, ngtcp2-gnutls and the linux varians
quiche, bearssl, libressl, mbedtls, openssl3, rustls
- added disabled in ngtcp2-wolfssl due to weird SSL_connect() errors
not reproducable locally

Improvements on pytest:

- handling of systems with nghttpx in $PATH
- configure will seach $PATH got nghttpx used in pytest
- pytest fixes for managing nghttpx without h3 support
- ngtcp2-wolfssl: use a fully enabled wolfssl build

- lower parallel count for http/1.1 tests, since we do not
want to test excessive connections.
- check built curl for HTTPS-proxy support in proxy tests
- bearssl does not like one of our critical cert extensions, making
it non-critical now
- bearssl is too slow for test_12, skipping
- making sure we do h3 tests only when curl and server support is there

Closes #10699

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tests: rename tests/tests-httpd to tests/http

- httpd is only one server we test with
- the suite coveres the HTTP protocol in general where
the default test cases need a more b

tests: rename tests/tests-httpd to tests/http

- httpd is only one server we test with
- the suite coveres the HTTP protocol in general where
the default test cases need a more beefy environment

Closes #10654

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