Log Message:
py-rt: Update to 2.0.1

pkgsrc changes:
 - Remove no longer needed patch-rt.py, now applied upstream.

Changes:
2.0.1
-----
 - Fix UnicodeDecodeError in logging code for non-text attachments
 - Documentation: Add a search example
 - edit_ticket: Handle possible empty responses: When a ticket is not
   modified, at least with RT 4.x, an empty response could be returned.
   Gracefully handle that as success.