Re-attach uniquely
--------------------

If you are attached to a remote screen over SSH and the connection drops, then
you re-attach later with ``screen -x``, there will still be some pseudo-zombie
sessions attached. This is annoying because the new sessions will have their
display dimensions locked to the dimensions of the old sessions. To connect to
a screen session as the only client (disconnecting all the old half-dead
sessions), use:

    $ screen -d -r