security/py-fail2ban: Add support for sshd-session

Now that sshd has been split into sshd and sshd-session, sshd-session
is now the producer of syslog messages. We cannot replace the existing
*sshd.conf files because this port must also run on older systems with
older OpenSSH. Therefore we add new filters to support both.

Reported by: sef (private email)

(cherry picked from commit c98813ccb07851890f73f442be26ce530b6744d0)