feat: auto close ssh connection if couldn't create the requested subdomain

[zk-steve]

…omain

[zk-steve]

Please, check this pull request

[antoniomika]

Hey @sonntuet1997,

This was actually intentionally. Because clients can ask for multiple forwards, we don't want to close the connection until all forwards are complete (or the client requests it). But because sish supports local forwards (direct-tcpip), we don't know if clients are done with their connection until they disconnect. Sorry it took so long for me to respond here.

I'll be closing this for the above. I was thinking maybe we could have clients that use a local forward tell clinc so? I want to still try to stick as much to the ssh semantics as possible though.