syntactic conversion -- the semantics should be exactly the same.
I haven't yet converted section 5 (advanced stuff), appendix A (device
naming) or appendix B (credits), and mdoc, even the souped-up version used
for INSTALL, seems to be lacking a fourth-level header macro, which this
wants.
Of course, the presence of fourth-level headers does somewhat indicate that
this whole area wants cleaning up lots.
