core, plugin Maildir: added "ProfileCreation" Trigger

This trigger is user by maildir to create account data for the new profile

src/tools/memory.py

@@ -131,6 +131,8 @@ class Param():
         if self.params.has_key(name):
             info (_('The profile name already exists'))
             return 1
+        if not self.host.trigger.point("ProfileCreation", name):
+            return 0
         self.params[name]={}
         return 0