QSettings regression when being used in INI format

QSettings with IniFormat being used with keys like 'general/entry1' do
write all items into a '%General' section.
This is what the doc explains as a way to ensure no keys without a group may
get overwritten.

This seems to be a little messed up:

1. QSettings and keys using the group 'general' can create multiple sections - this happens with previous qt version too.

2. Since 5.0, these sections fail to be read (@see the attached example)