- drop leading indent from Markdown.
- switch to Markdown section markers where missing.
- move `&&` and `||` to the end of the line (C, Perl).
- openssl: add parenthesis to an if sub-expression.
- misc clang-format nits.
- unfold Markdown links.
- SSL-PROBLEMS.md: drop stray half code-fence.
Closes#20402
- to avoid dupes.
- missing slashes.
- drop `.git` suffix from GitHub git repo URLs for a few outliers.
- use short YouTube URL like curl-www does.
- sync two RFC doc URLs with others.
Closes#19879
In an attempt to make them easier to find.
The man pages runtests.md and testcurl.md are in /docs
The rest of the test documentation is in /docs/tests
Closes#17463
