doc/FAQ* files are hosed

Comparing the current-CVS FAQ files with those in the REL6_4 branch
is depressing --- almost every one is messed up in one branch or the
other.

The main FAQ is newer in the 6.4 branch than in the current branch; the
6.4 version seems to have numerous small fixes that are not in the main
branch. FAQ_CVS is also newer in 6.4; it's been de-HTMLized in 6.4
(good) but not in current. FAQ_HPUX, FAQ_Irix, and FAQ_Linux are
completely trashed in the 6.4 branch --- all three have been overwritten
with some generic document.

I'd check in some fixes, but a look at the CVS logs makes me think that
part of the problem is too many cooks stirring the broth already.
Whoever is primary maintainer of these files probably should take
responsibility for getting the branches back in sync.

regards, tom lane