268fabe manifest: Add screen

Authored and Committed by Colin Walters 9 years ago
    manifest: Add screen
    
    This is a drive by commit with no review, I know...but I keep getting
    complaints about this.  It's a tiny binary, and it doesn't make a lot
    of sense to run tmux/screen inside a container, as normally you want
    them to be bound to the lifecycle of your login, not dockerd.