Slightly reword comment.  Move code, which is described by the
comment, after it.

Discussed with:	bde
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week


git-svn-id: svn+ssh://svn.freebsd.org/base/head@272538 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f