Merge branch '6.0' into 6.1

* 6.0:
  Fix: Readd versionadded directive
  Fixed a small typo in messenger.rst

Author: OskarStark

messenger.rst

@@ -1530,7 +1530,7 @@ The transport has a number of options:
 Amazon SQS
 ~~~~~~~~~~
 
-The Amazon SQS transport is perfect for application hosted on AWS. Install it by
+The Amazon SQS transport is perfect for applications hosted on AWS. Install it by
 running:
 
 .. code-block:: terminal