- keep the case consistent between the actual name and what's referenced.
e.g, if it's `foo', don't use '.Nm Foo' at the start of a sentence.
- remove unnecessary `.Nm foo' after the first occurrence (except for
using `.Nm ""' if there's stuff following, or for the 2nd and so on
occurrences in a SYNOPSIS
- use Sx, Ic, Li, Em, Sq, and Xr as appropriate
Also, while here, expand apparently incorrectly .Dd month abbreviations.
(I thought about doing this in tmac/doc-common...heh...that would have
allowed a possible reverse map back to abbreviations.)
