Merge branch '2.3' into 2.4

Author: weaverryan

components/routing/hostname_pattern.rst

@@ -212,9 +212,9 @@ instance, if you want to match both ``m.example.com`` and
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                 xsi:schemaLocation="http://symfony.com/schema/routing http://symfony.com/schema/routing/routing-1.0.xsd">
 
-                <route id="mobile_homepage" path="/" host="m.example.com">
+                <route id="mobile_homepage" path="/" host="m.{domain}">
                     <default key="_controller">AcmeDemoBundle:Main:mobileHomepage</default>
-                    <default key="domain">%domain%</requirement>
+                    <default key="domain">%domain%</default>
                     <requirement key="domain">%domain%</requirement>
                 </route>