[ospfd] Clear adjacency state for NSM changes down to TwoWay/ExStart

[ospfd] Clear adjacency state for NSM changes down to TwoWay/ExStart

2006-07-02 Paul Jakma <paul.jakma@sun.com>

	* ospf_nsm.c: (nsm_clear_adj) clear adjacency related state for a
	  neighbour, needed for some state changes from > ExStart down
	  to ExStart or less, which need not go through nsm_reset_nbr.
	  (nsm_reset_nbr) move code to former. Should be static.
	  (ospf_nsm_event) Remove long dead code.
	  Use nsm_clear_adj for state changes that take down
	  adjacencies to TwoWay/ExStart.
	  (nsm_kill_nbr) Oops, action function shouldn't try return
	  1 for error.