Handle case when RB_REROOT isn't defined yet (case: updating older versions of base system to current)
Handle case when RB_REROOT isn't defined yet (case: updating older versions of base system to current)

VerKnowSys/ServeD-OS,VerKnowSys/svdOS,VerKnowSys/ServeD-OS,VerKnowSys/svdOS,VerKnowSys/svdOS