[ospfd] Add support for oversized LSAs.

[ospfd] Add support for oversized LSAs.

2006-01-18 Juergen Kammer <j.kammer@eurodata.de>

	* ospf_lsa.c: (ospf_router_lsa_new) dont take reference to the
	  stream data until it is constructed, data reference is
	  volatile due to the potential resize in link_info_set

2006-01-18 Paul Jakma <paul.jakma@sun.com>

	* ospf_lsa.c: (link_info_set) Resize the stream if required and
	  possible. Return number of links added.
	  (lsa_link_*_set) use return value from previous.
	* ospf_lsa.h: Add OSPF_ROUTER_LSA_LINK_SIZE define.