Switch DCCManager to ServerCtcpEvent.

Change-Id: I8b55a2e47099629e6fe80344451f45826a44c188
Reviewed-on: http://gerrit.dmdirc.com/3499
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>
Maybe convert actions listening to events in script plugin.

Change-Id: I495ed1f6717e93a2362fcca37866aeef150fbc4a
Reviewed-on: http://gerrit.dmdirc.com/3500
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>
Remove another singleton.

Change-Id: I83d319c563b2862caf7278a1d60669cfff5242ce
Reviewed-on: http://gerrit.dmdirc.com/3501
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>