fixing up /usr/doc

[Zack Brown <zbrown@lynx.neu.edu>]

/usr/doc is virtually unusable because of the many bogus entries it has. The
directory listing takes a long time to even start to display, and most of
the entries are pretty much empty anyway. why not make /usr/doc a place
where real documentation (and *only* real documentation) can be found. Right
now users have to sift through endless stubs to get to the real stuff.

Why not have a /usr/doc/stubs directory, where stubs can go until they get
some real docs to put in them?

Zack