Security update for mailman
This update for mailman fixes the following issues:
Security issue fixed:
- CVE-2020-12108: Fixed a content injection bug (boo#1171363).
Non-security issue fixed:
- Don't default to invalid hosts for DEFAULT_EMAIL_HOST (boo#682920)
- Submitted by Matej Cepl (mcepl)
Fixed bugs
bnc#682920
strange defaults in mailman
bnc#1171363
VUL-1: CVE-2020-12108: mailman: arbitrary content injection in options.py