Ticket 47597 - Convert retro changelog plug-in to betxn
    
    Retro cl plugin is already betxn aware.  The template and 20betxn.pl script
    needed to be updated to reflect the new default.
    
    https://fedorahosted.org/389/ticket/47597
    
    Reviewed by: richm(Thanks!)
    (cherry picked from commit 3dca85ec629be641f07ae2ecfef59609d4dc88e2)
    (cherry picked from commit 229d270428dc4cfabd7d367444f1c0b10a60ef87)