Honor --force in the nuke() function
Honor --force in the nuke() function

This patch adds support for --force in the nuke() function. It still
does not delete the file, because I am in the tube and I am rethinking
the (not pretty) design of the code. So just a few thoughts about the
design:

- A whole config struct should be passed to nuke()
- Such a struct should be built before calling nuke. This is needed
  because we have to compute the actual config values first (remember
  the default section).
- The config struct generation should be moved into its own function.

rumpelsepp/filereaper