Log Message:
Updated py-postgresql to 5.0.2.

Ok from OWNER, darcy.

Version 5.0.2 (2016-09-08)
--------------------------
- Fixed an infinite recursion problem in the DB wrapper class of the classic
  module that could occur when the underlying connection could not be properly
  opened (bug report by Justin Pryzby).

Version 5.0.1 (2016-08-18)
--------------------------
- The update() and delete() methods of the DB wrapper now use the OID instead
  of the primary key if both are provided. This restores backward compatibility
  with PyGreSQL 4.x and allows updating the primary key itself if an OID exists.
- The connect() function of the DB API 2.0 module now accepts additional keyword
  parameters such as "application_name" which will be passed on to \ 
PostgreSQL.
- PyGreSQL now adapts some queries to be able to access older PostgreSQL 8.x
  databases (as suggested on the mailing list by Andres Mejia). However, these
  old versions of PostgreSQL are not officially supported and tested any more.
- Fixed an issue with Postgres types that have an OID >= 0x80000000 (reported
  on the mailing list by Justin Pryzby).
- Allow extra values that are not used in the command in the parameter dict
  passed to the query_formatted() method (as suggested by Justin Pryzby).
- Improved handling of empty arrays in the classic module.
- Unused classic connections were not properly garbage collected which could
  cause memory leaks (reported by Justin Pryzby).
- Made C extension compatible with MSVC 9 again (this was needed to compile for
  Python 2 on Windows).