Add flag to force key-based user connection to use their key's username.

[SirHall]

It would be useful to be able to have the server force each connecting client (if using public key authentication) to forcefully be assigned the username from their public key.

[shazow]

To be clear, this would only work for whitelist pubkeys? Or admin pubkeys?

I like this idea overall, would you be interested in working on it?

Collisions will need to be renamed to GuestXXXX.

[SirHall]

Optimally you'd have a separate flag for each.
I may be able to work on it.

[yhojann-cl]

By example: ssh-rsa AAAA... myusername and prevent change nick, or add command to get key from user, by example /getkey username to identificate logged user when use whitelist keys. By example ./ssh-chat --whitelist '...' --forced-usernames