lui-toggle-fool-display: force redisplay such that invisibility is updated

This seems to fix issue 31.
circe-network-options: Newer bitlbee users are called "bitlbee"

This used to be "root", but that changed for newer bitlbee servers.
circe-channel-message-handler: Set correct variable for RPL_ISUPPORT

This used to set a variable with a wrong name. Oops.