bpo-33524: Fix the behavior when max_line_length is 0 or None in email.policy#6966

Licht-T wants to merge 2 commits intopython:masterpython/cpython:masterfrom

Licht-T:fix-zero-max_line_length-bahavior-in-email-policyLicht-T/cpython:fix-zero-max_line_length-bahavior-in-email-policyCopy head branch name to clipboard