Print par-files creator app, especially if par-repair fails

[hugbug]

An issue was reported on forum where par-repair fails with message:

repair completed but the data files still appear to be damaged

It seems the issue is caused by posters using development version of ParPar, a version which wasn't released for public usage actually.

Par2 file format specification describes a field of par2-file containing identification information about application which created par2-files. The specification also says:

If a client is unable to process a recovery set, the contents of the creator packet must be shown to the user. The goal of this is that any client incompatibilities can be found and resolved quickly.

If NZBGet would print par2 creator that would certainly helped to identify the cause of the issue sooner.

[hugbug]

Example error message including creator info: