If cntlm is already running print status and exit.
h4x: Add getopt to bash.d mkscreen function.

Starting to want additional options and the static positional arguments
don't cut it anymore. This means that mkscreen now requires a -- before
any command options that are meant to be passed on. It is best to use
the format:

  mkscreen [options] -- name command args...

Existing screens have been updated to reflect this change.
Add MKSCREEN_SORT variable to activate sorting.

Caution: Not sure how thoroghly the sorting was tested (which might
explain why it was off and no option to enable it was available yet).
Add mkscreen option to simultaneously execute.

As well as an environment variable. I am considering making it the
default behavior to execute.
Source proxy environment if already started.
h4x: Fix proxy restart logic.

The subshell doesn't let us know the exit status apparently so we need
to execute in the same shell. The downside is that we throw away the
output the first time and have to pay all of the overhead again if we
want to output it.
Normalize references to proxy.
Ignore stderr when generating PS1.
h4x: Add a screen for taskwarrior tutorial.