Document expectations for opencloud/bin/opencloud init --force-overwrite

[rhafer]

no no, I think it's a bug that needs to be fixed. opencloud/bin/opencloud init --force-overwrite should work

Hm, --force-override means that a few central settings get re-generated. Basically all service accounts have their password changed and the admin user's uuid changes.

I am not entirely sure how this is supposed to work, when opencloud was already bootstrapped (i.e. opencloud server has been started at least once with the old config).

Though I think we should at least document the side-effects of --force-overwrite

Originally posted by @rhafer in #217