While interesitng in theory, there is nothing to be gained here,
because we don't really have user input at those early stages.
As we are also not a privileged process, those early stage
sandboxes in the end are not worth it, since they increase
complexity while there is no benefit in practise.
So, reduce those 3 stages to a single one (enable()), which we
activate after CLI server has launched.
main: Parse args using getopt_long() in main().
Begin implementation of a CLI. It can be launched
using ./qswiki config --cli.
Allow connecting to another instance using "attach" command.
This uses Unix domain sockets, and in the future can be used
to drop caches, reload template, etc.
Closes: #21
