[3.5] bpo-30746: Prohibited the '=' character in environment variable names (GH-2382)#2392

serhiy-storchaka merged 3 commits intopython:3.5python/cpython:3.5from

serhiy-storchaka:backport-7770394-3.5serhiy-storchaka/cpython:backport-7770394-3.5Copy head branch name to clipboard