Disable Linux specific firewall checks.

Index: firewallsettings.py
--- firewallsettings.py.orig
+++ firewallsettings.py
@@ -227,27 +227,13 @@ class SystemConfigFirewall:
             debugprint ("Exception: %r" % exc)
 
     def write (self):
-        try:
-            self._fw.write (json.dumps (self._fw_data[0]))
-        except:
-            pass
+        pass
 
     def _check_any_allowed (self, search):
-        (args, filename) = self._get_fw_data ()
-        if filename is None: return True
-        isect = set (search).intersection (set (args))
-        return len (isect) != 0
+        return True
 
-
     def add_service (self, service):
-        try:
-            (args, filename) = self._fw_data
-        except AttributeError:
-            (args, filename) = self._get_fw_data ()
-        if filename is None: return
-
-        args.append ("--service=" + service)
-        self._fw_data = (args, filename)
+        pass
 
     def check_ipp_client_allowed (self):
         return self._check_any_allowed (set(["--port=%s:%s" %