Trivial finger service for running as UCSPI-TCP server.

    $ mkdir fingers
    $ cat > fingers/@ <<EOF
    Welcome to finger service!
    EOF
    $ cat fingers/user <<EOF
    User information.
    Bla bla bla
    EOF

    [run under daemontools'es supervise]
    # cd fingers
    # tcpserver -DRH -l 0 ::0 79 setuidgid user timeout 1m gofingerd 2>&1