Halve the security errors at startup, but still annoyingly many of them.

common/content/help-single.xsl

@@ -0,0 +1,36 @@
+<!DOCTYPE document SYSTEM "chrome://liberator/content/liberator.dtd">
+
+<xsl:stylesheet version="1.0"
+    xmlns="http://www.w3.org/1999/xhtml"
+    xmlns:html="http://www.w3.org/1999/xhtml"
+    xmlns:liberator="http://vimperator.org/namespaces/liberator"
+    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+    xmlns:str="http://exslt.org/strings"
+    xmlns:exsl="http://exslt.org/common"
+    extension-element-prefixes="exsl str">
+
+    <xsl:output method="xml" indent="no"/>
+
+    <xsl:variable name="root" select="/liberator:document"/>
+    <xsl:variable name="tags">
+        <xsl:text> </xsl:text>
+        <xsl:for-each select="$root//@tag|$root//liberator:tags/text()|$root//liberator:tag/text()">
+            <xsl:value-of select="concat(., ' ')"/>
+        </xsl:for-each>
+    </xsl:variable>
+
+    <xsl:template name="parse-tags">
+        <xsl:param name="text"/>
+        <div liberator:highlight="HelpTags">
+        <xsl:for-each select="str:tokenize($text)">
+            <a id="{.}" liberator:highlight="HelpTag"><xsl:value-of select="."/></a>
+        </xsl:for-each>
+        </div>
+    </xsl:template>
+
+    <xsl:template match="/">
+        <xsl:call-template name="parse-tags">
+            <xsl:with-param name="text" select="$tags"/>
+        </xsl:call-template>
+    </xsl:template>
+</xsl:stylesheet>