Fixed typo in permission "Reture" -> "Retire".

Author: Bernhard Reiter

roundup/backends/back_anydbm.py

@@ -236,7 +236,7 @@ def addclass(self, cl):
             description="User is allowed to edit "+cn)
         self.security.addPermission(name="View", klass=cn,
             description="User is allowed to access "+cn)
-        self.security.addPermission(name="Reture", klass=cn,
+        self.security.addPermission(name="Retire", klass=cn,
             description="User is allowed to retire "+cn)
 
     def getclasses(self):