Change logic of overriding disabled coredump

Override not only for Quick Feedback, but whenever PID = 0, which means
only logs will be collected. Such a request has to be triggered by user
directly or from some external application and refusing to carry it out
is merely confusing.

Moreover, soon when excessive power drain will be able to trigger log
collection, rich-core-dumper would block with coredumping disabled,
as it did before 6e785bb875656b7d39f41788be31834243790aa4.
Merge pull request #33 from xhaakon/master

Change logic of overriding disabled coredump