Welcome

You have come to the right place if you want to support httplib2 by doing. Thank you!

Reporting security / sensitive issues
Regular issues please try to find existing solution first, search without issue/open filters.
If you intend to propose code change, there is no need to open an issue first. Pull request is more than enough. git diff in message is fine too.
Tests use TLS certificates/keys generated by script/generate-tls

Submitting changes (pull request policy)

Run pre-commit install once to setup hooks that detect/fix common style issues and run unit tests. pre-commit website
If you don't want pre-commit hooks, please run script/test before commit
Test is required, or at least coverage must not decrease
One commit is strongly preferred, except for very big changes
Feel free to append yourself into contributors
Commit message should follow the following formula:

subsystem: description of why the change is useful

optional details

links to related issues or websites

The why part is very important. Diff already says what is changed. Explain why.