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/030-data/150-logs/010-sys-logs.sql

@@ -0,0 +1,29 @@
+/*
+ * Test privileges on sys.logs
+ */
+BEGIN;
+	SELECT plan( 4 );
+	
+	SELECT diag_test_name( 'sys.logs - INSERT privileges' );
+	SELECT throws_ok(
+		$$ INSERT INTO sys.logs( component , level , message )
+			VALUES ( 'test' , 'WARNING'::log_level , 'test' );
+		$$ , 42501 );
+
+	SELECT diag_test_name( 'sys.logs - UPDATE privileges' );
+	SELECT throws_ok(
+		$$ UPDATE sys.logs SET component = 'retest'; $$ ,
+		42501 );
+
+	SELECT diag_test_name( 'sys.logs - SELECT privileges' );
+	SELECT lives_ok(
+		$$ SELECT * FROM sys.logs; $$
+	);
+
+	SELECT diag_test_name( 'sys.logs - DELETE privileges' );
+	SELECT throws_ok(
+		$$ DELETE FROM sys.logs; $$ ,
+		42501 );
+
+	SELECT * FROM finish( );
+ROLLBACK;