Added HTML purifier support

Change-Id: Ic76ebc3f3fb05518d0a0427b3fe327e4269ee7a9
Signed-off-by: SJ <sj@acts.hu>

webui/system/helper/standalone/HTMLPurifier/ConfigSchema/schema/HTML.Parent.txt

@@ -0,0 +1,12 @@
+HTML.Parent
+TYPE: string
+VERSION: 1.3.0
+DEFAULT: 'div'
+--DESCRIPTION--
+
+<p>
+    String name of element that HTML fragment passed to library will be
+    inserted in.  An interesting variation would be using span as the
+    parent element, meaning that only inline tags would be allowed.
+</p>
+--# vim: et sw=4 sts=4