TLS: add support for ECH (Encrypted Client Hello)

An EXPERIMENTAL feature used with CURLOPT_ECH and --ech.

Closes #11922

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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copyright: update all copyright lines and remove year ranges

- they are mostly pointless in all major jurisdictions
- many big corporations and projects already don't use them
- save

copyright: update all copyright lines and remove year ranges

- they are mostly pointless in all major jurisdictions
- many big corporations and projects already don't use them
- saves us from pointless churn
- git keeps history for us
- the year range is kept in COPYING

checksrc is updated to allow non-year using copyright statements

Closes #10205

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tests: add HTTP/3 test case, custom location for proper nghttpx

- adding support for HTTP/3 test cases via a nghttpx server that is
build with ngtcp2 and nghttp3.
- test2500 is the

tests: add HTTP/3 test case, custom location for proper nghttpx

- adding support for HTTP/3 test cases via a nghttpx server that is
build with ngtcp2 and nghttp3.
- test2500 is the first test case, performing a simple GET.
- nghttpx is checked for support and the 'feature' nghttpx-h3
is set accordingly. test2500 will only run, when supported.
- a specific nghttpx location can be given in the environment
variable NGHTTPX or via the configure option
--with-test-nghttpx=<path>

Extend NGHTTPX config to H2 tests as well

* use $ENV{NGHTTPX} and the configured default also in http2 server starts
* always provide the empty test/nghttpx.conf to nghttpx. as it defaults to
reading /etc/nghttpx/nghttpx.conf otherwise.

Added nghttpx to CI ngtcp2 jobs to run h3 tests.

Closes #9031

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copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the

copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the file
`.reuse/dep5`.

This commit also adds a Github workflow to check pull requests and adapts
copyright.pl to the changes.

Closes #8869

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tests: refactor server/socksd.c to support --unix-socket

Closes #8687

msh3: add support for QUIC and HTTP/3 using msh3

Considered experimental, as the other HTTP/3 backends.

Closes #8517

.gitignore: add directory containing the stats repo

Since the new curl/stats repository is designed to be
checked out into the curl repository working tree as stats/
it should be on

.gitignore: add directory containing the stats repo

Since the new curl/stats repository is designed to be
checked out into the curl repository working tree as stats/
it should be on the ignore list to aid in commit staging.

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source cleanup: remove all custom typedef structs

- Stick to a single unified way to use structs
- Make checksrc complain on 'typedef struct {'
- Allow them in tests, public heade

source cleanup: remove all custom typedef structs

- Stick to a single unified way to use structs
- Make checksrc complain on 'typedef struct {'
- Allow them in tests, public headers and examples

- Let MD4_CTX, MD5_CTX, and SHA256_CTX typedefs remain as they actually
typedef different types/structs depending on build conditions.

Closes #5338

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scripts/completion.pl: also generate fish completion file

This is the renamed script formerly known as zsh.pl

Closes #3545

checksrc: add COPYRIGHTYEAR check

Forgetting to bump the year in the copyright clause when hacking has
been quite common among curl developers, but a traditional checksrc
check isn't

checksrc: add COPYRIGHTYEAR check

Forgetting to bump the year in the copyright clause when hacking has
been quite common among curl developers, but a traditional checksrc
check isn't a good fit as it would penalize anyone hacking on January
1st (among other things). This adds a more selective COPYRIGHTYEAR
check which intends to only cover the currently hacked on changeset.

The check for updated copyright year is currently not enforced on all
files but only on files edited and/or committed locally. This is due to
the amount of files which aren't updated with their correct copyright
year at the time of their respective commit.

To further avoid running this expensive check for every developer, it
adds a new local override mode for checksrc where a .checksrc file can
be used to turn on extended warnings locally.

Closes #3303
Reviewed-by: Daniel Stenberg <daniel@haxx.se>

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ossfuzz: Move to C++ for curl_fuzzer.

Automake gets confused if you want to use C++ static libraries with C
code - basically we need to involve the clang++ linker. The easiest way
of

ossfuzz: Move to C++ for curl_fuzzer.

Automake gets confused if you want to use C++ static libraries with C
code - basically we need to involve the clang++ linker. The easiest way
of achieving this is to rename the C code as C++ code. This gets us a
bit further along the path and ought to be compatible with Google's
version of clang.

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ossfuzz: additional seed corpora

Create simple seed corpora for:
- FTP
- telnet
- dict
- tftp
- imap
- pop3

based off the tests of the same number.

ossfuzz: additional seed corpora

Create simple seed corpora for:
- FTP
- telnet
- dict
- tftp
- imap
- pop3

based off the tests of the same number.

Closes #1842

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gitignore: ignore .xz now instead of .lzma

gitignore: ignore top-level .vs folder

This folder is generated when using the CMake build system from within
Visual Studio.

Closes https://github.com/curl/curl/pull/1746

test: add impacket for SMB testing

Import impacket 0.9.15 for use in SMB testing. This was generated by
doing "pip2.7 install -t . impacket"

Unnecessary files for current testin

test: add impacket for SMB testing

Import impacket 0.9.15 for use in SMB testing. This was generated by
doing "pip2.7 install -t . impacket"

Unnecessary files for current testing were deleted.

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gitignore: ignore all vim swap files

Closes #1561

build: Install zsh completion

Fixes #534
Closes #537

gitignore: Sort for readability

find . -name .gitignore -print0 | xargs -i -0 sort -o '{}' '{}'

gitignore: Ignore Windows build output directories

gitignore: ignore test-driver file

Revert "repository: ignore patch files generated by git"

This reverts commit 217024a687ce86eb6d2317822ed81c7e5abc4b61.

Bug: https://github.com/bagder/curl/commit/217024a6#commitcomm

Revert "repository: ignore patch files generated by git"

This reverts commit 217024a687ce86eb6d2317822ed81c7e5abc4b61.

Bug: https://github.com/bagder/curl/commit/217024a6#commitcomment-8693738

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gitignore: ignore .dirstamp files

repository: ignore patch files generated by git

Ignores the patch files generated by the 'git format-patch' command.

Moved some patterns to subfolder's .gitignore.