Enable zsh virtualenv plugin.
Add old email addresses as mutt alternatives.
Use zsh (and ssh-agent) to run proxy scripts.

Since I use oh-my-zsh's ssh-agent plugin, using zsh to run this script will
make it pick up the running ssh-agent.
bin/sshfs.meckintosh: Initial commit.
bin/poseidon-pg: Initial commit.
bin/sshfs.selene: Delete script. Selene is long gone.
Replace sshfs.* scripts with sftpman.

sftpman does pretty much everything these scripts do, with a nicer interface,
*plus* unmounting. Jolla script kept since it uses environment variables.