Bug#4057: compress package install additional zcat

[Yves Arrouye <arrouye@marin.fdn.fr>]

 > 
 > There should be one zcat and it should always be gzip.  This won't
 > break anything as gzip understands .Z files...
 > 
 > Making zcat point to compress even sometimes will definitely break
 > things; IME much of the Linux world has been assuming it's gzip for a
 > number of years.  That seems unlikely to change.

Ok, I've corrected that: I build a package without any of the commands
provided by gzip.

 > compress is obsolete software; there's never any need to use it to
 > uncompress things.  Indeed, my experience (err, on Sunos rather than
 > Linux, so this may not be relevant) is that gzip is much more reliable
 > even at uncompressing .Z files.  I can't see the need to compress
 > things using compress either, as gzip produces smaller output, runs on
 > pretty much everything and is free.

Only one need: compress X font files, until someone makes the X font-reading
stuff aware of gzip.

YA.