thompsa 3da0e4ba1f Change from a callback in if_ethersubr to using EVENTHANDLER in order to detach
span ports when they disappear. The span port does not have a pointer to the
softc so revert r1.31 and bring back the softc linked-list.

MFC after:	2 weeks
2005-12-17 06:33:51 +00:00
..
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