conf: store keysfile on .dunikey format (and split in two files)
We must split keyspairs in two files: network.dunikey
and member.dunikey
.dunikey format:
pub: 4v8Zvuu4qQYoeBcVbwWovjWWgXVfD4En2FzeDyiEM68N
sec: Fm6XndyK95qtSXgVE8ftaR1rkJrk2QiuSSX6HcGQQT454hz7ykQiFNPS7qBNqFoUiZL3tJ9gt6KsGfAZktDeUTQ
pub := public key in base58
sec := secret key in base58
WARNING: it's necessary to verify connection in cesium with .dunikey file generated !