Empire resources update

* Added a new update that computes the amount of resources possessed and
owed by empires. At the moment this computation ignores fleets, as their
upkeep does not use the resource system.

legacyworlds-server-data/db-structure/tests/user/050-updates/015-empire-resources/010-process-empire-resources-updates.sql

@@ -0,0 +1,11 @@
+/*
+ * Test privileges on sys.process_empire_resources_updates()
+ */
+BEGIN;
+	SELECT plan( 1 );
+
+	SELECT diag_test_name( 'sys.process_empire_resources_updates() - Privileges' );
+	SELECT throws_ok( 'SELECT sys.process_empire_resources_updates( 1 )' , 42501 );
+	
+	SELECT * FROM finish( );
+ROLLBACK;