[util] Allow unknown entries in some cases in config parser.
[util] Allow unknown entries in some cases in config parser.

Always fail for unknown values in global_configuration sections
attached_output_devices, default_output_device, and
attached_input_devices. For modules section fail if channel masks,
formats, devices, or flags have no known entries found.

mer-hybris/pulseaudio-modules-droid,jusa/pulseaudio-modules-droid,mlehtima/pulseaudio-modules-droid,mlehtima/pulseaudio-modules-droid,mer-hybris/pulseaudio-modules-droid,ballock/pulseaudio-modules-droid,jusa/pulseaudio-modules-droid,ballock/pulseaudio-modules-droid