MFC r226654, r226657, r226658:

MFC r226654, r226657, r226658:

MFC r226654 [1]:
Add etc/rc.d/static_ndp, analogous to etc/rc.d/static_arp.
Make sure that static ARP and NDP bindings are set before NETWORKING.

As static_ndp is based on static_arp, pass copyright to the project with
permission of the original author (delphij@).

MFC r226657 [2]:
Correctly reassign copyright of etc/rc.d/static_ndp back to delphij@
as the project itself is no legal entity

MFC r226658 [3]:
Add information about static_ndp_pairs to rc.conf(5) manual page

Reviewed by:	Xin Li <delphij@FreeBSD.org> [1]
Reported by:	Joe Dahl <joel@vnode.se> [2]
Submitted by:	Sergey Kandaurov <pluknet@FreeBSD.org> [3]

git-svn-id: svn://svn.freebsd.org/base/stable/8@226787 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f