[2.1.3] Fix PHP warning from MakeAbsolute, also improve URIFilter documentation

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1422 48356398-32a2-884e-a903-53898d9a118a

tests/HTMLPurifier/URIFilter/MakeAbsoluteTest.php

@@ -111,6 +111,12 @@ class HTMLPurifier_URIFilter_MakeAbsoluteTest extends HTMLPurifier_URIFilterHarn
         $this->assertFiltering('.', '../');
     }
     
+    function testRemoveJavaScriptWithEmbeddedLink() {
+        // credits: NykO18
+        $this->setBase('http://www.example.com/');
+        $this->assertFiltering('javascript: window.location = \'http://www.example.com\';', false);
+    }
+    
     // error case
     
     function testErrorNoBase() {