Boris Feld <boris.feld@octobus.net> [Tue, 10 Oct 2017 10:49:15 +0200] rev 34662
configitems: allow for the registration of "generic" config item
Some section can contains arbitrary keys (eg: color, alias, extensions). We
add a way to register some generic config items for them. This is necessary to
get all the config registered. We use a regular expression because some sub-
attributes (eg: hooks.xxx.priority) can define default value on their own.