Styling tweak for generated HTML man pages

Styling tweak for generated HTML man pages

Prefer "Georgia" as a typeface over the less readable
Times New Roman, but with Times New Roman then "serif"
as fallbacks.  Georgia is available everywhere.

Provide 10px top/bottom and 30px left/right margin on
the main body for readability.  Margins are good.

For review:

Old:
http://docs.openafs.org/Reference/8/kas_apropos.html
New:
http://kickflop.net/openafs-man-20110617/kas_apropos.html

Change-Id: I687b2007ef56019c5b683a43ac3811426ec825b0
Reviewed-on: http://gerrit.openafs.org/4850
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Simon Wilkinson <sxw@inf.ed.ac.uk>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>