remove SSH_ORIG_CLIENT hack
add some comments to non-obvious code
Pinch ssh environment saving approach from http://www.deadman.org/sshscreen.php
Run zrec
ControlPersist seems to cause more problems than it's worth
ssh-remove
Don't use ControlMaster for 192.168
handle agent forwarding better
drop user
fix typo in reporting guessed pid
use lsof if available
explain how this differs from ssh-copy-id
fix usage text