Work on target docs committed

[Brian S. Julin]

I committed some changes which probably break the SGML in
the target doc -- Eric, before you go on vacation, could you
send me specs on your build environment/process in case 
docs need to be tested/regenerated?

I think I also incorrectly added the flags I added, now that
I look at Eric's HTML output.

On the productive side, what I added was docs for -physz options
and for any options I saw implemented that had missed being documented
somehow.

--
Brian