MFC r215544,215683:

MFC r215544,215683:
Scan the list in reverse order for the shutdown handlers of loaded modules.
This way, when there is a dependency between two modules, the handler of the
latter probed runs first.

Sponsored by:	Sandvine Incorporated

git-svn-id: svn://svn.freebsd.org/base/stable/8@216042 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f