Use callback to detect redfam.section

Detecting redfam-Sections via RegExp caused some false positives due to
wrong formated things in wikisyntax. See Task

Related Task: [https://fs.golderweb.de/index.php?do=details&task_id=78 FS#78]

redfam.py

@@ -341,6 +341,22 @@ class RedFamParser( RedFam ):
         else:
             return False
 
+    @classmethod
+    def is_section_redfam_cb( cls, heading ):
+        """
+        Used as callback for wikicode.get_sections in redpage.parse to
+        select sections which are redfams
+        """
+        # Because of strange behavior in some cases, parse heading again
+        # (Task FS#77)
+        heading = mwparser.parse( str( heading ) )
+
+        # Make sure we have min. two wikilinks in heading to assume a redfam
+        if len( heading.filter_wikilinks() ) >= 2:
+            return True
+        else:
+            return False
+
     @classmethod
     def parser( cls, text, page, isarchive=False ):
         """