there was only one now backend (INI) and changing it on the fly
(as was supported before) can cause serious issues with
applications misbihaving and such
Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
this saves 2 stat system calls for every config object created but
is not a complete overheath reduction I belive because there are
enumartors and other code related to globals that I'm afraid to
touch because I'm not very familiar with the configs code. needs
a review.
