be able to publish other kind of keys

Right now webapp/nickserver only accepts openpgp keys. The API described in the doc mentions type for send_key. But AFAIK the actual implementation differs from that.

Right now we upload keys by PUT {"user[public_key]": "<openpgp-key>"} to https://nicknym.provider.com/1/users/user@provider.com.json. Can we add an extra entry in the data we send to provide the key type? Something like user[key_type]? I guess for backward compatibility will make sense to default to openpgp if the type entry is not provided.

AFAIK to discover keys the current API is a POST address=user@provider.com to https://nicknym.provider.com that returns a json like:

{
   "address": "user@provider.com",
   "openpgp": "<openpgp-key>"
}

It looks like we can just extend it adding entries with the names of the types.