[3.15] gh-149816: Fix SNI callback callable race (GH-150018) - #150099

[3.15] gh-149816: Fix SNI callback callable race (GH-150018)#150099

serhiy-storchaka merged 2 commits into

python:3.15python/cpython:3.15from

miss-islington:backport-8b31d08-3.15miss-islington/cpython:backport-8b31d08-3.15Copy head branch name to clipboard