[RADIATOR] CoA-Request vs Change-Filter-Request in radpwtst

[Vangelis Kyriakakis]

Hello,

      Radpwtst client uses code Change-Filter-Request for message 43
which is based on old rfc2882. Message 43 has been renamed to
CoA-Requestin later rfc5176. The same stands for messages 44,45. It
would be nice to change the names to the new ones since the old names
cause some misunderstandings especially when talking to vendor support
teams in order to solve CoA problems.

              Regards
                     Vangelis