Add ?channels=x,y,z alias for ?join=x,y,z
Add ?channels=x,y,z alias for ?join=x,y,z

For backwards compat. with Iris and other systems.

williamboman/lounge,FryDay/lounge,FryDay/lounge,thelounge/lounge,MaxLeiter/lounge,thelounge/lounge,ScoutLink/lounge,williamboman/lounge,ScoutLink/lounge,MaxLeiter/lounge,ScoutLink/lounge,realies/lounge,MaxLeiter/lounge,FryDay/lounge,williamboman/lounge,realies/lounge,realies/lounge