c128baa rgmanager/lvm.sh: Fix bug 431705

Authored and Committed by Jonathan Brassow 16 years ago
    rgmanager/lvm.sh: Fix bug 431705
    
    - Add another check for improper HA LVM setup.  Specifically,
      check for fail-over VG name in 'volume_list', which would
      allow a machine to activate a VG regardless of tagging.
    
    - Clearer error messages
    
    - Better comments