keep a collection of key-channel pairs that, when receiving an XML-RPC
dispatch message with a key and message, sends the message to the
associated channel. this allows for various notification bus style stuff
this is the barebones version, there's no IRC admin interaction yet, so
all key-channel pairs need to be managed by direct database access. it
is possible i won't bother changing this. there are also some
not-so-clever assumptions, like that the bot is already in the channel
it is trying to speak in
