Dialplan: Deal better with hangup causes.
Dialplan: Deal better with hangup causes.

Don't answer before early media playback of announcements.
Include some hangup causes.
Add an unauthorised announcement.

FIXME: In the case we seem to have an error but
don't know what it is we play "all lines are busy"

Rhizomatica/rccn,Rhizomatica/rccn,Rhizomatica/rccn,Rhizomatica/rccn,Rhizomatica/rccn