Multi::IRC: Various small improvements
Multi::IRC: Various small improvements

- Don't report edits made by Multi
- Fixed a synchronisation issue in the double-notify detection
- Users in the 'masters' list has access to 'OP' commands as well
  (without needing +o)
- Doubled the quotes spam delay

morkt/vndb,morkt/vndb,christian-roggia/vndb,christian-roggia/vndb,morkt/vndb,erengy/vndb,erengy/vndb,morkt/vndb,morkt/vndb,christian-roggia/vndb,erengy/vndb