*sh: steal Lann's fancy tmux ssh-agent trick
*sh: steal Lann's fancy tmux ssh-agent trick

Let's try this for a few days. If it works and doesn't run into any edge
cases, we can get rid of `ssh-reagent` and perhaps even the `timeout3`
script.

Signed-off-by: Wincent Colaiuta <c76ac2e9cd86441713c7dfae92c451f3e6d17fdc@wincent.com>

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent