Allow to configure services from ${LOCALBASE}/etc/rc.conf.d

Reviewed by:	bdrewery
MFC after:	1 week
Relnotes:	yes


git-svn-id: svn+ssh://svn.freebsd.org/base/head@270676 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Fix xref, pam(8) -> pam(3)

PR:		193045
Submitted by:	rsimmons0 gmail com
MFC after:	3 days


git-svn-id: svn+ssh://svn.freebsd.org/base/head@270677 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f