csv_to_fd: improve validation When an AVP Code or Name is duplicate, differentiate between a duplicate entry (AVPs are equivalent) versus an actual mismatch. Consistent AVP formatting in errors. Collect all errors and display at end of each file parse, instead of exiting on first error.

The digested changelog can be found under:
 contrib/debian/changelog
 
You can also find the exhaustive list of change using mercurial history, 
or at the following URL: http://www.freediameter.net/hg/freeDiameter/shortlog