update the todo

TODO.markdown

@@ -3,15 +3,13 @@
 Must of the stuff is working, but there is a list of smaller
 things that need to be fixed.
 
-## Todo
-
 * Use the Exchange structure to deal with errors when resolving
 * encoding NSEC3/NSEC bitmaps, DEcoding works;
 * add functions to operate on []byte messages (raw packets) see rawmsg.go
 * HIP RR (needs list of domain names, need slice for that);
 * IsSubdomain, IsGlue helper functions;
-* axfr/ixfr dynamic updates
-* Cleanup?;
+* axfr/ixfr and dynamic updates;
+* Cleanup?
 * Multiline RRs when parsing;
 * Need to define a handy zone data structure (r/b tree)?.
   - Should do glue detection