First working implementation

- implemented update request processing
- separated host and domain name in config (req. for DNS updates)
- enhanced NFT update validation
- cleaned up example user
- cleand up logging in update request
- moved appropriate config into user request struct

users/example.yml

@@ -1,19 +1,20 @@
 password: $2a$10$ymHFfGjKINWsUKwEo5xp.efN6DR6NkiRCXsbH4VWo0Nnzma8Yc.82
+domain: dyn.local
 router: 
-  DNS: brandfeld.dyn.local
+  Hostname: mainhost
   NFT:
     table: sshguard
     set4: blackhole
     set6: blackhole6
 others:
-  - DNS: atlantis.dyn.local
+  - Hostname: atlantis
     v6iid: ::dead:beef:dead:beef
     registerv4: true
     NFT: 
       table: sshguard
       set4: blackhole
       set6: blackhole6
-  - DNS: troya.dyn.local
+  - Hostname: troya
     v6iid: ::cafe:babe:deca:fbad
     registerv4: false
     NFT: