[add] HTML Purifier added to clean code

inc/3rdparty/htmlpurifier/HTMLPurifier/ConfigSchema/schema/URI.DefaultScheme.txt

@@ -0,0 +1,10 @@
+URI.DefaultScheme
+TYPE: string
+DEFAULT: 'http'
+--DESCRIPTION--
+
+<p>
+    Defines through what scheme the output will be served, in order to
+    select the proper object validator when no scheme information is present.
+</p>
+--# vim: et sw=4 sts=4