Allow SSH agent forwarding

[sesceu]

I'm using a gnubby key for SSH and SSH-ing into servers works fine using the ssh-agent.

However, gitea responds with permission denied (I did add the public key to gitea).

I checked the contents of ~/.ssh/authorized_keys inside gitea's docker container and it contains:

# gitea public key

command="/usr/local/bin/gitea --config=/data/gitea/conf/app.ini serv key-1",no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty,no-user-rc,restrict <REDACTED PUBLIC KEY> publickey

I think this commad is hardcoded in:

gitea/models/asymkey/ssh_key_authorized_keys.go

Line 41 in 165a3ea

tplPublicKey = tplCommentPrefix + "\n" + `command=%s,no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty,no-user-rc,restrict %s` + "\n"

So, it would be nice if there was an option to enable/disable these hardcoded flags (most importantly for me the no-agent-forwarding).

[sesceu]

Nevermind, I was having a port-forwarding issue.