Merge branch '4.4' into 5.0

* 4.4:
  Fix wrong Symfony listeners range

Author: javiereguiluz

event_dispatcher.rst

@@ -125,7 +125,7 @@ listener class:
     and it controls the order in which listeners are executed (the higher the
     number, the earlier a listener is executed). This is useful when you need to
     guarantee that one listener is executed before another. The priorities of the
-    internal Symfony listeners usually range from ``-255`` to ``255`` but your
+    internal Symfony listeners usually range from ``-256`` to ``256`` but your
     own listeners can use any positive or negative integer.
 
 .. _events-subscriber: