Bug#446932: Link to upstream bug report and workaround
I'm using SSH for TCP forwarding in a script, and needed the exact
functionality (--print-pid when using -f) to tear down the daemon
when the script ends. This bug is the first link for "ssh print pid"
on Google where I also found bug #1473  in the OpenSSH BTS
(reported May 2008) which also requests this feature. That bug report
contains the recommended way to implement connection sharing with
graceful exits. While not exactly --print-pid, I think that
workaround will also work for me.