dnsmgmt: add FQDN support for DNS servers. It's needed for NS records on zones
Z-Eye Service: first part of DNS manager. Data are loaded. Now we need to write to server
dnsmgmt & Z-Eye service: now TSIG key are wrote into server. Also add base64 check for TSIG key on the frontend
Z-Eye Service: DNSManager now writes all named.conf configuration (options, ACL, zones). Now zone management is needed (and empty zone when file doesn't exist)
Remove useless Log