cvmfs_server_util.sh - expand XFS checks
cvmfs_server_util.sh - expand XFS checks

Add check for the value of the ftype parameter, when /var/spool/cvmfs is
located on an XFS partition. "ftype=1" is supported. If "ftype=0" error
out and warn user.

Gangbiao/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,cvmfs/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,Gangbiao/cvmfs,DrDaveD/cvmfs,Gangbiao/cvmfs,Gangbiao/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,cvmfs/cvmfs,Gangbiao/cvmfs,DrDaveD/cvmfs