[Tcsh] tcsh.man improvements style question

[Jamie Landeg-Jones]

... trying to find out how to build the latest tcsh.man, I looked
at the file BUILDING. Not only does it not mention how to build,
it refers to the old nroff -mdoc man page.

Perhaps this could be updated?

Also, the now ironically named file "NewThings" contains references
to the old man->html script.

I've got the man page working myself, so this isn't a cry for help,
just a few suggestions!

Cheers, Jamie