mdoc: sort SEE ALSO.


git-svn-id: svn+ssh://svn.freebsd.org/base/head@276381 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
mdoc: sort SEE ALSO.


git-svn-id: svn+ssh://svn.freebsd.org/base/head@276382 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f