conf-parser: don't unescape parsed configuration strings by default

conf-parser: don't unescape parsed configuration strings by default

In many cases this might have a negative effect since we drop escaping
from strings where we better shouldn't have dropped it.

If unescaping makes sense for some settings we can readd it later again,
on a per-case basis.

https://bugs.freedesktop.org/show_bug.cgi?id=54522