MFC r277627,r277650,r282059,r283056,r283840,r283845:

MFC r277627,r277650,r282059,r283056,r283840,r283845:

r277627 (by will):

Add routing_test:static_ipv6_loopback_route_for_each_fib.
It tests that all FIBs get a static IPv6 loopback route.

Submitted by:	asomers
Sponsored by:	Spectra Logic
MFSpectraBSD:	1048456 on 2014/03/13
		1114523 on 2015/01/23

r277650 (by will):

Add tests/etc/rc.d to mtree.

Submitted by:	stefanf
MFC with:	277627

r282059:

Move etc/tests/rc.d to etc/rc.d/tests to match the directory layout jmmv@
documented and implemented in other areas of the FreeBSD tree

r283056:

Move all test integration pieces for etc/ from etc/ to tests/

This is being done to fix breakage with make distribution with read-only
source trees as make distribution doesn't use make obj like building
tests/ does in all cases

Reported by: Wolfgang Zenker <wolfgang@lyxys.ka.sub.org>
Suggested by: jhb

r283840:

Remove empty tests directory

r283845:

Append to SUBDIR, not set it

Pointyhat to: ngie

git-svn-id: svn://svn.freebsd.org/base/stable/10@283846 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f