importer: Correctly sort the results

The results where incorrectly ordered so that the DISTINCT clause
removed the wrong rows matching an incorrect parent subnet.
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

src/python/location-importer.in

@@ -305,11 +305,12 @@ class CLI(object):
 				) AS is_anycast,
 
 				-- Must be part of returned values for ORDER BY clause
-				masklen(known_networks.network) AS sort
+				masklen(announcements.network) AS sort_a,
+				masklen(networks.network) AS sort_b
 			FROM known_networks
 				LEFT JOIN announcements ON known_networks.network <<= announcements.network
 				LEFT JOIN networks ON known_networks.network <<= networks.network
-			ORDER BY known_networks.network, sort DESC
+			ORDER BY known_networks.network, sort_a DESC, sort_b DESC
 		""")
 
 		for row in rows: