Made sip_auto_publish_presence exit cleanly on SIGUSR1

darcs-hash:20090114171927-1e3d8-48be24add4bc3a51f52fff31cd6412fcf65bf40c
Changed output of sip_subscribe_presence for privacy

darcs-hash:20090114172012-1e3d8-b8a36505af27f1c74f6244cfe00503c3acb20a02