[#1916] Adding back details that are new in 2.1 - partially taken from @dbu

Author: weaverryan

cookbook/console/generating_urls.rst

@@ -16,6 +16,46 @@ what URL it should use when generating URLs.
 There are two ways of configuring the request context: at the application level
 and per Command.
 
+Configuring the Request Context globally
+----------------------------------------
+
+.. versionadded:: 2.1
+    The host and scheme parameters are available since Symfony 2.1
+
+To configure the Request Context - which is used by the URL Generator - you can
+redefine the parameters it uses as default values to change the default host
+(localhost) and scheme (http). Note that this does not impact URLs generated
+via normal web requests, since those will override the defaults.
+
+.. configuration-block::
+
+    .. code-block:: yaml
+
+        # app/config/parameters.yml
+        parameters:
+            router.request_context.host: example.org
+            router.request_context.scheme: https
+
+    .. code-block:: xml
+
+        <!-- app/config/parameters.xml -->
+        <?xml version="1.0" encoding="UTF-8"?>
+
+        <container xmlns="http://symfony.com/schema/dic/services"
+            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+
+            <parameters>
+                <parameter key="router.request_context.host">example.org</parameter>
+                <parameter key="router.request_context.scheme">https</parameter>
+            </parameters>
+        </container>
+
+    .. code-block:: php
+
+        // app/config/config_test.php
+        $container->setParameter('router.request_context.host', 'example.org');
+        $container->setParameter('router.request_context.scheme', 'https');
+
 Configuring the Request Context per Command
 -------------------------------------------