SQL logging fixes

* Added user mapping on the "remote" logging database for the
administrative user. This allows calls to sys.write_sql_log() to succeed
when they are executed by code with administrative privileges.

* Added test suites for both the link to the database and the function
itself.

* Replaced RAISE NOTICE with actual logging in the universe generator

legacyworlds-server-data/db-structure/tests/user/040-functions/005-logs/010-write-sql-log.sql

@@ -0,0 +1,13 @@
+/*
+ * Test the sys.write_sql_log( ) function
+ */
+BEGIN;
+	SELECT plan( 1 );
+	
+	SELECT diag_test_name( 'sys.write_sql_log( ) - Privileges' );
+	SELECT lives_ok(
+		$$ SELECT sys.write_sql_log( 'test' , 'WARNING'::log_level , 'test' ) $$
+	);
+
+	SELECT * FROM finish( );
+ROLLBACK;