bridge(4) input path fixing

[Matthew Dillon]

:Hi all,
:
:Following patch fixes bridge serializer coverage problem and possible
:serializer ordering problem:
:http://leaf.dragonflybsd.org/~sephe/bridge.diff
:
:cpuN's msgport is used.
:
:Please review/test it.
:
:Best Regards,
:sephe

    I'm not sure tags can be ignored that way.   Tags are usually not
    allocated (I could be wrong, but that is what I remember)... instead
    they are often declared as stack variables in the calling procedure
    so they have to be stripped by the callee before returning, because
    their memory may go poof.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>