removed TODO: implemented and used IPSocket::registerProtocol() instead protocolmapping parameter
removed TODO - ChannelInstaller removed at 2011-03-10
msg files: legacy enum(Foo) syntax changed to @enum(Foo)

also: minor syntax error fix in RIPPacket.msg
PassiveQueueBase: queueingTimeSignal emits simtime_t always
@signal fixes - was missed, wrong type