[getdns-api] Section 5.3 Types pf RDATA Returned in the API

[Willem Toorop]

I have gone through the list of RR types and have a few remarks/suggestions.

- APL rdata should be a list of dicts containing
      address_family (an int), prefix (an int), n (an int),
      and afdpart (a bindata)
- NSEC3 - remove salt_length (it is already in salt.size)
        - remove hash_length (it is already in hash.size)
        (those length/data wire format combinations have a single
         key in other RRs (TXT, TSIG, TKEY))
- NSEC3PARAM - remove salt_length (it is already in salt.size)
- HIP - remove pk_length (it is already in public_key.size)
      - remove hit_length (it is already in hit.size)
      - turn rendezvous_servers in a list of bindata (which are dnames)
- L32 - Replace locator32_msbs and locator64_lsbs with locator32
        (the msb/lsb indication in the RFC are because of line break)
- remove IXFR and AXFR. (The zone is indicated by the owner/query name).
- Why add the _obsolete and _unknown rdata?
  Is it different from rdata_raw?
- Add EUI48 and EUI64 (rfc now)