This is recommended by the Python Requests documentation:
> It’s a good practice to set connect timeouts to slightly larger than a
multiple of 3, which is the default TCP packet retransmission window.
This allows us to keep a very low connect timeout of 3 seconds, but also
ensure that long commands (e.g. --wait or VM disable) can take as long
as the API requires to complete.
Avoids having to explicitly set very long single-instance timeouts for
other functions which would block forever on an unreachable API.
Also fixes up the Debian packaging such that this works how I would
want, with proper module installation while leaving everything else
untouched. Finally implements automatic installation and removal of the
BASH completion for the PVC command.