[1.4.0] Implemented AttrDef_CSSURI for url(http://google.com) style declarations

- 1.3.3 release downgraded to "not likely"

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@639 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/AttrDef/CSS.php

@@ -20,6 +20,9 @@ class HTMLPurifier_AttrDef_CSS extends HTMLPurifier_AttrDef
         
         // we're going to break the spec and explode by semicolons.
         // This is because semicolon rarely appears in escaped form
+        // Doing this is generally flaky but fast
+        // IT MIGHT APPEAR IN URIs, see HTMLPurifier_AttrDef_CSSURI
+        // for details
         
         $declarations = explode(';', $css);
         $propvalues = array();