We now allow server operators to customize the /r/ part of the channel links
The new config option in the template is commented and the config module validates and will terminate with status 78 if an improper value is used.
We've also dropped some old cruft and uses a more elegant method to assign CHANNEL.name
Resolves#668
The `from` field has existed for ages, but was never actually displayed.
Displaying it to users reduces confusion about who is making the
announcement.
