Preview: bugfix release v22.1.0

[pajod]

The following PRs merge fine. I recommend these go into a 22.1.0 bugfix release.

OUTSTANDING PROBLEM: 3210 need rebase, it was meant to be used on top of 3127 initially, right now git merges it fine but the code is inappropriate.

• CI: verify docs are up to date benoitc/gunicorn#3217
• CI: Pylint 3.x benoitc/gunicorn#3110
• workers/gthread: Remove locks + one event queue + general cleanup benoitc/gunicorn#3157
• 22.0.0 regression: We need a better default treatment of SCRIPT_NAME benoitc/gunicorn#3192
• Python 3.4+: use os.set_inheritable + os.set_blocking in place of unreadable fcntl calls benoitc/gunicorn#3210
• Refuse requests with invalid and dangerous CR/LF/NUL in header field value, as demanded by rfc9110 section 5.5 benoitc/gunicorn#3253
• Strip trailing optional whitespace (OWS) from single-line header field values benoitc/gunicorn#3254
• refuse empty request-target in HTTP request benoitc/gunicorn#3255
• exclude generate html files from source tarballs (sdist) benoitc/gunicorn#3257
• gracefully handle chunked encoding missing size benoitc/gunicorn#3258

Please do not actually octopus merge though, sequential merges produce clearer output in common git tools. Created using this script:

#!/bin/sh
# assuming .git/config fetches pull requests from GitHub, e.g:
# [remote "benoitc"]
#         url = https://github.com/benoitc/gunicorn.git
#         fetch = +refs/heads/*:refs/remotes/benoitc/*
#         fetch = +refs/pull/*/head:refs/remotes/benoitc/pr/*
set -e
echo "preparing branch"
git checkout -B integration-v22.1.0 benoitc/master
git reset --hard benoitc/master
echo "octopus merge"
git merge --verbose --no-edit benoitc/pr/3217 benoitc/pr/3110 benoitc/pr/3157 \
 benoitc/pr/3192 benoitc/pr/3210 benoitc/pr/3253 benoitc/pr/3254 benoitc/pr/3255 \
 benoitc/pr/3257 benoitc/pr/3258
echo "version commit"
sed -i -e 's/22, 0, 0/22, 1, 0/' gunicorn/__init__.py
git commit -m "bump version 22.1.0" -- gunicorn/__init__.py
echo "building"
pip install -U build
python -m build
echo "searching for expected file in sdist"
tar -tf dist/gunicorn-22.1.0.tar.gz  | grep -m 1 gunicorn/__main__.py
echo "searching for unexpected file in sdist"
tar -tf dist/gunicorn-22.1.0.tar.gz  | grep -m 1 docs/build || echo 'none found (good!)'
echo "done"