[trac1294] add comment pointing to ticket todo

doc/guide/bind10-guide.xml

@@ -1271,6 +1271,7 @@ TODO
       development release, however, it only tries AXFR by default,
       and care should be taken to enable IXFR.
     </para>
+<!-- TODO: http://bind10.isc.org/ticket/1279 -->
 
     <note><simpara>
      In the current development release of BIND 10, incoming zone
@@ -1313,6 +1314,7 @@ TODO
       <screen>&gt; <userinput>config set Xfrin/zones[0]/use_ixfr true</userinput></screen>
       </para>
 
+<!-- TODO: http://bind10.isc.org/ticket/1279 -->
       <note><simpara>
       One reason why IXFR is disabled by default in the current
       release is because it does not support automatic fallback from IXFR to

src/bin/xfrin/b10-xfrin.xml

@@ -75,6 +75,7 @@ in separate zonemgr process.
       and care should be taken to enable IXFR.
       See the BIND 10 Guide for more details.
     </para>
+<!-- TODO: http://bind10.isc.org/ticket/1279 -->
 
     <para>
       This daemon communicates with BIND 10 over a

src/bin/xfrin/xfrin.py.in

@@ -956,6 +956,7 @@ class ZoneInfo:
         """Set use_ixfr. If set to True, it will use
            IXFR for incoming transfers. If set to False, it will use AXFR.
            At this moment there is no automatic fallback"""
+        # TODO: http://bind10.isc.org/ticket/1279
         if use_ixfr is None:
             self.use_ixfr = \
                 self._module_cc.get_default_value("zones/use_ixfr")