Auditorium mode fixes (cmode +A)
Hide quits and nick changes as well.

-Kobi.
Changed SVSTAG to send/receive umodes in text and fixed incorrect and missing comments.

-Kobi.
Changes to deal with bogus akills
- Changed m_akill() to warn about bogus akills and also "fix" them (add them anyway for 30 minutes
  as services only sends AKILL commands when it really wants to take out users).
- Added more debugging to m_rakill().

-Kobi.
Merge pull request #10 from DALnet/master

Auditorium mode+svstag+akill+rakill fixes