Update the credits.

ltratt · ltratt · commit c51b6dae121d · 2012-02-15T11:21:58.000Z
diff --git a/CREDITS b/CREDITS
@@ -6,3 +6,4 @@ I thank the following people for their role in extsmail's development (in
 alphabetical order):
 
   Geerd-Dietger "Didi" Hoffmann
+  Olivier Girondel

Original file line number	Diff line number	Diff line change
`@@ -6,3 +6,4 @@ I thank the following people for their role in extsmail's development (in`
`6`	`6`	`alphabetical order):`
`7`	`7`
`8`	`8`	`Geerd-Dietger "Didi" Hoffmann`
	`9`	`+ Olivier Girondel`