Appears to be missing .info.dsn_parameters dict

[jcpunk]

The psycopg2 module appears to have a dictionary .info.dsn_parameters which is not present in psycopg2cffi.

On psycopg2 it appears to contain:

 {'user': 'postgres', 'passfile': '/home/jcpunk/.pgpass', 'dbname': 'tests', 'host': '127.0.0.1', 'port': '28583', 'tty': '', 'options': '', 'sslmode': 'prefer', 'sslcompression': '0', 'gssencmode': 'prefer', 'krbsrvname': 'postgres', 'target_session_attrs': 'any'}