Merge pull request #2259 from rumpelsepp/mailmap-update

Add my "community email address" to NICKS

NICKS

@@ -52,7 +52,7 @@ pluby		<[email protected]>
 pyfisch		<[email protected]>
 qbit		<[email protected]>
 ralder		<[email protected]>
-rumpelsepp	<[email protected]>
+rumpelsepp	<[email protected]> <[email protected]>
 sciurius	<[email protected]>
 seehuhn		<[email protected]>
 snnd		<[email protected]>