Description of problem:
In my postgresq DB I have "ident" as auth method when using Unix sockets and "md5" for anything else. In this scenario, rhn-satellite-activate will fail because /usr/lib/python2.7/site-packages/spacewalk/server/rhnSQL/driver_postgresql.py has the following code:

class Database(sql_base.Database):
    """ Class for PostgreSQL database operations. """

    def __init__(self, host=None, port=None, username=None,
                 password=None, database=None):

        if host is None or host == '' or host == 'localhost':
            self.host = None
            self.port = None
        else:
            self.host = host
            self.port = port


I have host = localhost in /etc/rhn/rhn.conf and the above will try to connect without having set 'host' to anything and the connect will fail due to wrong auth:
init.py:179:connect:SQLConnectError: (None, None, 'spacewalk', 'Attempting Re-Connect to the database failed')

Traceback (most recent call last):
  File "/usr/bin/rhn-satellite-activate", line 42, in <module>
    sys.exit(abs(mod.main() or 0))
  File "/usr/lib/python2.7/site-packages/spacewalk/satellite_tools/rhn_satellite_activate.py", line 580, in main
    rhnSQL.initDB()
  File "/usr/lib/python2.7/site-packages/spacewalk/server/rhnSQL/init.py", line 102, in initDB
    initDB(backend, host, port, username, password, database)
  File "/usr/lib/python2.7/site-packages/spacewalk/server/rhnSQL/init.py", line 55, in initDB
    __DB.connect()
  File "/usr/lib/python2.7/site-packages/spacewalk/server/rhnSQL/driver_postgresql.py", line 174, in connect
    return self.connect(reconnect=0)
  File "/usr/lib/python2.7/site-packages/spacewalk/server/rhnSQL/driver_postgresql.py", line 163, in connect
    password=self.password)
  File "/usr/lib64/python2.7/site-packages/psycopg2/init.py", line 179, in connect
    connection_factory=connection_factory, async=async)
SQLConnectError: (None, None, 'spacewalk', 'Attempting Re-Connect to the database failed')

If I change the line "if host is None or host == '' or host == 'localhost':"
to " if host is None or host == ''": things are fine.

Version-Release number of selected component (if applicable):
# rpm -qf /usr/lib/python2.7/site-packages/spacewalk/server/rhnSQL/driver_postgresql.py
spacewalk-backend-sql-postgresql-1.10.32-1.fc18.noarch