(parse_packet): Likewise.
(parse_unparsed): Likewise.
(login_request): Likewise.  Don't handle muxes.
(logout_request): Likewise.
(message_request): Likewise.
(mux_handle_packet): Removed.
(mux_logout): Removed.
(mux_parse_unparsed): Removed.
(mux_parse_message): Removed.
(milli_timevaldiff): New name for former timevaldiff.  Return the
	difference in milliseconds instead of microseconds.
(toploop): Use milli_timevaldiff instead of timevaldiff.  This is
	a thousand times better at avoiding overflow.  Use isc_puts
	instead of isc_printf.