openssh unix dev - Oct 2006 - Sending signal to process via channel

Hi,

After I exec a process in a ssh channel, I would like to send it a
signal.  According to the ssh specs, I'd send a
SSH_MSG_CHANNEL_REQUEST message across the channel with a "signal"
string.  But, it doesn't seem that openssh supports this.

I searched around and found
http://marc.theaimsgroup.com/?l=openssh-unix-dev&m=104295745607575&w=2
from a couple years ago.  Is there any particular reason why this
hasn't made its way into released code?

Thanks,
Joe