channel_request_start
channel_request_start(ssh, i, "window-change", 0);
channel_request_start(ssh, client_session_id, "x11-req", want_reply);
void channel_request_start(struct ssh *, int, char *, int);
channel_request_start(ssh, c->self, "break", 0);
channel_request_start(ssh, id, "env", 0);
channel_request_start(ssh, id, "pty-req", 1);
channel_request_start(ssh, id, "subsystem", 1);
channel_request_start(ssh, id, "exec", 1);
channel_request_start(ssh, id, "shell", 1);
channel_request_start(ssh, id, "auth-agent-req@openssh.com", 0);
channel_request_start(ssh, channel_id,
channel_request_start(ssh, s->chanid, "exit-status", 0);
channel_request_start(ssh, s->chanid, "exit-signal", 0);
channel_request_start(ssh, id, "auth-agent-req@openssh.com", 0);