Migrate TODO's to gitlab issues.

TODO.org

-** TODO Write rr-data->bytes
-** TODO Extend define-record-type to generate type validators
-** TODO Standardized names for rcode types?
-Currently the following are used, but are there more standardized names?
-- NOERROR :: 0
-- NXDOMAIN :: 1
-- SERVFIL :: 2
-** TODO A higher level interface
-#+BEGIN_SRC scheme
-#+END_SRC
-*** TODO Ways to build dns-messages without explicitly crafting a header
-*** TODO Automatically recurse