merged branch Tobion/collection-hostname (PR #6018)

This PR was squashed before being merged into the master branch (closes #6018).

Commits
-------

6334343 [Routing] removed getHostnamePattern from RouteCollection

Discussion
----------

[Routing] removed getHostnamePattern from RouteCollection

this method is not useful and can introduce inconsistencies when a sub-route has a different hostname, which already has a getter for the hostname

src/Symfony/Component/Routing/RouteCollection.php

@@ -46,11 +46,6 @@ class RouteCollection implements \IteratorAggregate, \Countable
      */
     private $parent;
 
-    /**
-     * @var string
-     */
-    private $hostnamePattern = '';
-
     public function __clone()
     {
         foreach ($this->routes as $name => $route) {
@@ -274,24 +269,12 @@ class RouteCollection implements \IteratorAggregate, \Countable
     }
 
     /**
-     * Returns the hostname pattern.
-     *
-     * @return string The pattern
-     */
-    public function getHostnamePattern()
-    {
-        return $this->hostnamePattern;
-    }
-
-    /**
-     * Sets the hostname pattern on this collection and all children.
+     * Sets the hostname pattern on all child routes.
      *
      * @param string $pattern The pattern
      */
     public function setHostnamePattern($pattern)
     {
-        $this->hostnamePattern = (string) $pattern;
-
         foreach ($this->routes as $name => $route) {
             $route->setHostnamePattern($pattern);
         }