suppress private friends

include/docca/base-config.xsl

@@ -41,7 +41,7 @@
 
   <xsl:function name="d:should-ignore-friend">
     <xsl:param name="element" as="element(memberdef)"/>
-    <xsl:sequence select="contains($element, '_helper')"/>
+    <xsl:sequence select="not($element/@d:prot eq 'public') or contains($element, '_helper')"/>
   </xsl:function>
 
 </xsl:stylesheet>

include/docca/base-extract-xml-pages.xsl

@@ -189,6 +189,7 @@
                   <!-- Insert a reference to each child member's page ID -->
                   <xsl:template mode="compound-page-insert" match="memberdef">
                     <xsl:attribute name="d:page-refid" select="d:make-id(/doxygen/compounddef/compoundname||'.'||name)"/>
+                    <xsl:attribute name="d:prot" select="@prot"/>
                   </xsl:template>
 
                   <!-- Alternative implementation in case we need to start controlling whitespace more