ProxyCommand that returns a socket

[Igor Bukanov]

Hello,

My usage of ProxyCommand just calls the nc utility with various
parameters. That in turn after the initial setup just copies copies
the data from the network socket to stdin/stdout. This useless coping
can be avoided if ssh has an option to receive the socket from the
proxy command. I suppose it can improve network error reporting as ssh
would talk directly to the network socket rather than a proxy, right?