FEATURE: Allow overriding of metadata of subsites virtual pages (from r85204)
FEATURE: Allow overriding of metadata of subsites virtual pages (from r85204)

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