Meant to replace kio_gzip.
Couldn't test it, because file:/blah.gz#gzip: makes KURL return true
in isLocalFile. I wonder where kio_gzip was used at all, since the URL
was never created this way automatically.

This directory also provides the actual filters for gzip and bzip2.
The latter comes with a configure test now.

svn path=/trunk/kdebase/kioslave/; revision=68491