Merge branch '4.4' into 5.0

* 4.4:
  fix a typo in mailer docs (Mutliple -> Multiple)

Author: javiereguiluz

Diff for: mailer.rst

@@ -690,7 +690,7 @@ you have a transport called ``async``, you can route the message there:
 Thanks to this, instead of being delivered immediately, messages will be sent to
 the transport to be handled later (see :ref:`messenger-worker`).
 
-Mutliple Email Transports
+Multiple Email Transports
 -------------------------
 
 You may want to use more than one mailer transport for delivery of your messages.