Bugfix: Fix problems exposed due to testing and improve "Init".

Bugfix: Fix problems exposed due to testing and improve "Init".

As expected, I have found several regressions as a result of the mass conversion to fl_print_format() and similar.
There are several places where the wrong parameters or string replacements are used.

Improve the Controller to allow for "Init" to not attempt to mount the pid file (which allows Init to also manage initial mounting and device creation without depending on the existence of the filesystem structure).
The Controllerr "Init" now treats an empty string for the --pid option as disabling the pid file creation.
Do not treat exiting as a result from interrupts as an exit error.