Merge branch '4.3' into 4.4

* 4.3:
  [Mailer] Address::fromString() is not available in 4.3

Author: javiereguiluz

mailer.rst

@@ -151,10 +151,6 @@ both strings or address objects::
         // (email clients will display the name)
         ->from(new NamedAddress('fabien@example.com', 'Fabien'))
 
-        // defining the email address and name as a string
-        // (the format must match: 'Name <email@example.com>')
-        ->from(Address::fromString('Fabien Potencier <fabien@example.com>'))
-
         // ...
     ;