Implement trailing greedy star star.

Trailing args grabs all trailing arguments as a single passed
parameter.  This is useful when you want to have trailing arguments
that contain / in them.

lib/Cake/Routing/Route/CakeRoute.php

@@ -148,7 +148,10 @@ class CakeRoute {
 			}
 			$names[] = $name;
 		}
-		if (preg_match('#\/\*$#', $route)) {
+		if (preg_match('#\/\*\*$#', $route)) {
+			$parsed = preg_replace('#/\\\\\*\\\\\*$#', '(?:/(?P<_trailing_>.*))?', $parsed);
+			$this->_greedy = true;
+		} elseif (preg_match('#\/\*$#', $route)) {
 			$parsed = preg_replace('#/\\\\\*$#', '(?:/(?P<_args_>.*))?', $parsed);
 			$this->_greedy = true;
 		}
@@ -226,6 +229,11 @@ class CakeRoute {
 			unset($route['_args_']);
 		}
 
+		if (isset($route['_trailing_'])) {
+			$route['pass'][] = $route['_trailing_'];
+			unset($route['_trailing_']);
+		}
+
 		// restructure 'pass' key route params
 		if (isset($this->options['pass'])) {
 			$j = count($this->options['pass']);

lib/Cake/Test/Case/Routing/Route/CakeRouteTest.php

@@ -718,4 +718,30 @@ class CakeRouteTest extends CakeTestCase {
 		);
 		$this->assertEquals($expected, $result, 'Slug should have moved');
 	}
+
+/**
+ * Test the /** special type on parsing.
+ *
+ * @return void
+ */
+	public function testParseTrailing() {
+		$route = new CakeRoute('/:controller/:action/**');
+		$result = $route->parse('/posts/index/1/2/3/foo:bar');
+		$expected = array(
+			'controller' => 'posts',
+			'action' => 'index',
+			'pass' => array('1/2/3/foo:bar'),
+			'named' => array()
+		);
+		$this->assertEquals($expected, $result);
+
+		$result = $route->parse('/posts/index/http://example.com');
+		$expected = array(
+			'controller' => 'posts',
+			'action' => 'index',
+			'pass' => array('http://example.com'),
+			'named' => array()
+		);
+		$this->assertEquals($expected, $result);
+	}
 }