Sort the references in "SEE ALSO" by section first; then alphabetically.

Pointed out by: brueffer@


git-svn-id: svn+ssh://svn.freebsd.org/base/head@274179 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Separate references by a comma.


git-svn-id: svn+ssh://svn.freebsd.org/base/head@274180 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f