Log Message:
Add a pre-formatted catman page which is only used (copied into place)
under IRIX.  Other OS regen the catman page.

This addresses PR pkg/23452.

Since just depending on textproc/groff would pull in a large number of
packages (such as perl, ghostscript, tiff etc.), and since this is a very
important package that should NOT depend on all this gunk, Jeremy C. Reed
suggested this solution.

Ok agc.