Minor change to the local site-tmac files related to the recent man-db inclusion.
I shut off groff's "SGR" color codes by default, as nothing seems to use them right. Instead of defining GROFF_NO_SGR to shut off SGR, define GROFF_SGR to turn it on if you need it. Debian and Mandriva also seem to do the same - you get much more valid results searching for GROFF_SGR than GROFF_NO_SGR
