patch to add built-in support for port knocking

[Ryan Findley]

All,

A friend gave me access to an svn(+ssh) repository the other day, and  
told me that I needed to do some port knocking to open up ssh. It  
occurred to me that it would be extremely convenient if I could add a  
"knock" configuration option for the host to my ~/.ssh/config file  
and never think about this again (rather than creating a shell script  
to accomplish this behavior, and remembering to use it for remote  
access and svn activity).

After some pretty small changes to ssh.c and readconf.c, my dream is  
now a reality.
Might I be able to convince the good people of OpenSSH to consider  
adding my changes to CVS? If so, What do I have to do?

Thanks for your time,

-ryan findley