The document talks of settings_handler fields such
as ch_name and ch_set, whereas the actual names
are name, h_set, etc.
Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
This patch introduce doc for settings subsystem
with FCB and File System beck-ends.
Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>