Added support for two wkhtmltoimage options that were missing

src/Knp/Snappy/Image.php

@@ -65,9 +65,11 @@ protected function configure()
             'radiobutton-svg'              => null,    // Use this SVG file when rendering unchecked radiobuttons
             'run-script'                   => null,    // Run this additional javascript after the page is done loading (repeatable)
             'disable-smart-width'          => null,    // Use the specified width even if it is not large enough for the content
+            'enable-smart-width'           => null,    // Extend --width to fit unbreakable content (default)
             'stop-slow-scripts'            => null,    // Stop slow running javascripts
             'no-stop-slow-scripts'         => null,    // Do not stop slow running javascripts (default)
             'transparent'                  => null,    // Make the background transparrent in pngs *
+            'use-xserver'                  => null,    // Use the X server (some plugins and other stuff might not work without X11)
             'user-style-sheet'             => null,    // Specify a user style sheet, to load with every page
             'username'                     => null,    // HTTP Authentication username
             'width'                        => null,    // Set screen width (default is 1024)

test/Knp/Snappy/ImageTest.php

@@ -9,4 +9,11 @@ public function testCreateInstance()
         $testObject = new \Knp\Snappy\Image();
         $this->assertInstanceOf('\Knp\Snappy\Image', $testObject);
     }
-}
+
+    public function testAvailableOptions()
+    {
+        $testObject = new \Knp\Snappy\Image();
+        $testObject->setOption('use-xserver', true);
+        $testObject->setOption('enable-smart-width', true);
+    }
+}