release: Finish preparation for 4.11.2

release: updated pip2nix output for 4.11.2

release: Start preparation for 4.11.2

docs: added release notes for 4.11.2

sec: serialize the repo name in repo checks to prevent potential html injections.

diffs: in case of text lexers don't do any HL because of pygments newline conversion - split fix for non-standard file endings, e.g only \r - fixes #5422

webhook: fixed extra variable replacement.

meta: fix write condition for meta file.

pull-request, git: add option to skip --ff-only

gunicorn: update config to present consistent pre and post logs.