bash: add dump_agent alias, companion to refresh_agent
bash: add dump_agent alias, companion to refresh_agent

Basic usage pattern:

  ssh -A host
  dump_agent
  tmux attach -t session
  refresh_agent

And your tmux session will have its environment variables refreshed such that
you can connect to the forwarded agent; double-check with "ssh-add -l".

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

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