No-DNS Chatmail relay

With this branch, you don't need DNS at all, just a VPS with an IPv4 address, let's take 77.42.80.106 as an example:

cmdeploy init whatever.you.want
cmdeploy run --skip-dns-check --ssh-host 77.42.80.106

Then you can login with a dclogin:// code like this:

dclogin:s0m3r4nd0@whatever.you.want?p=w7i8da7h8uads92ycc2rufyl&v=1&ih=77.42.80.106&sh=77.42.80.106&sp=443&ip=443&ic=3&sc=3