-Note: as of version 1.5.0, BackupPC no longer supports telnet
-to its TCP port. First off, a unix domain socket is used
-instead of a TCP port. (The TCP port can still be re-enabled
-if your installation has apache and BackupPC running on different
-machines.) Secondly, even if you still use the TCP port, the
-messages exchanged over this interface are now protected by
-an MD5 digest based on a shared secret (see $Conf{ServerMesgSecret})
-as well as sequence numbers and per-session unique keys, preventing
-forgery and replay attacks.
-