sync with devel:
    Fri Feb 13 2009 Jens Petersen <petersen@redhat.com> - 6.10.1-9
    - require and buildrequire libedit-devel > 2.11-2
    - protect ghc_register_pkg and ghc_unregister_pkg
    Fri Jan 23 2009 Jens Petersen <petersen@redhat.com> - 6.10.1-8
    - fix to libedit means can drop ncurses-devel BR workaround (#481252)