BUGFIX: If the site config for a subsite is missing, create it. (from r90262) (from r96327)
BUGFIX: If the site config for a subsite is missing, create it. (from r90262) (from r96327)

danaenz/silverstripe-subsites,petpack/silverstripe-subsites,danaenz/silverstripe-subsites,dnadesign/silverstripe-subsites,mandrew/silverstripe-subsites,dnadesign/silverstripe-subsites,silverstripe/silverstripe-subsites,mikenz/silverstripe-simplesubsites,mandrew/silverstripe-subsites,silverstripe/silverstripe-subsites,wernerkrauss/silverstripe-subsites,wernerkrauss/silverstripe-subsites,petpack/silverstripe-subsites,mikenz/silverstripe-simplesubsites