+\c -i key private key file for user authentication
+\c -noagent disable use of Pageant
+\c -agent enable use of Pageant
+\c -hostkey aa:bb:cc:...
+\c manually specify a host key (may be repeated)
+\c -m file read remote command(s) from file
+\c -s remote command is an SSH subsystem (SSH-2 only)
+\c -N don't start a shell/command (SSH-2 only)
+\c -nc host:port
+\c open tunnel in place of session (SSH-2 only)