really adds support for .Z files (tested this time, thx to dcc package)
it uses the fortunate support of .Z files by gunzip
it also fixes the dcc package


git-svn-id: http://www.rocklinux.org/svn/rock-linux/trunk@1411 c5f82cb5-29bc-0310-9cd0-bff59a50e3bc

git-svn-id: http://www.rocklinux.org/svn/rock-linux/trunk@946 c5f82cb5-29bc-0310-9cd0-bff59a50e3bc