TODO:

- handle different domains (netlib.re, codelib.re, etc.)
  * each with a possible different template
- zone
  * use a template zone when adding a domain
  * some entries should be read only
- errors should be precise and dedicated (have their own dedicated message ID)
- verify
  * (server) request errors
  * (server) Resource Records to add, del and modify
  * (server) Zone validity on modification
  * (client) check for errors in the list of possible returned messages


DONE:
- domain new (simple domain, not an entire zone)
- domain del + zone del (alias)