[3.11] gh-136063: fix quadratic-complexity parsing in `email.message._parseparam` (GH-136072)#140830

ambv merged 2 commits intopython:3.11python/cpython:3.11from

miss-islington:backport-680a5d0-3.11miss-islington/cpython:backport-680a5d0-3.11Copy head branch name to clipboard