mailman security and bug fix update

3:2.1.12-25 - fix CVE-2002-0389 - local users able to read private mailing list archives 3:2.1.12-24 - fix CVE-2015-2775 - directory traversal in MTA transports 3:2.1.12-23 - fix 1095359 - handle update when some mailing lists have been created by newer Mailman than this one 3:2.1.12-22 - fix...