Add DLH to .mailmap

... and make the entries sorted.

.mailmap

@@ -7,6 +7,8 @@
 
 Aneesh Kumar K.V <[email protected]>
 Chris Shoemaker <[email protected]>
+Dana L. How <[email protected]>
+Dana L. How <[email protected]>
 Daniel Barkalow <[email protected]>
 David Kågedal <[email protected]>
 Fredrik Kuivinen <[email protected]>
@@ -19,8 +21,8 @@ Jon Loeliger <[email protected]>
 Jon Seymour <[email protected]>
 Karl Hasselström <[email protected]>
 Kent Engstrom <[email protected]>
-Lars Doelle <[email protected]>
 Lars Doelle <lars.doelle@on-line ! de>
+Lars Doelle <[email protected]>
 Lukas Sandström <[email protected]>
 Martin Langhoff <[email protected]>
 Michele Ballabio <[email protected]>
@@ -34,12 +36,11 @@ Sean Estabrooks <[email protected]>
 Shawn O. Pearce <[email protected]>
 Theodore Ts'o <[email protected]>
 Tony Luck <[email protected]>
-Uwe Kleine-König <[email protected]>
 Uwe Kleine-König <[email protected]>
-Uwe Kleine-König <[email protected]>
 Uwe Kleine-König <[email protected]>
+Uwe Kleine-König <[email protected]>
+Uwe Kleine-König <[email protected]>
 Ville Skyttä <[email protected]>
 YOSHIFUJI Hideaki <[email protected]>
 anonymous <[email protected]>
 anonymous <[email protected]>
-Dana L. How <[email protected]>