MFC r197203

MFC	r197203

Previously local end of point-to-point interface is not reachable
within the system that owns the interface. Packets destined to
the local end point leak to the wire towards the default gateway
if one exists. This behavior is changed as part of the L2/L3
rewrite efforts. The local end point is now reachable within the
system. The inpcb code needs to consider this fact during the
address selection process.

Reviewed by:	bz
Approved by:	re

git-svn-id: svn://svn.freebsd.org/base/stable/8@197229 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f