Revert "remove su for source superuser"

This reverts commit bf8152dc178213f9ab683616d723f5908f60be13.
Revert "add SUPERUSER_PACKAGE_PREFIX in prep for switch to new superuser"

This reverts commit 3d96009a91df0939eaf114314817bcdd364419c8.
Revert "prepare for switch to new superuser"

This reverts commit cd7f9f68fd1534df757ca73cab216d5573d69dd0.

Conflicts:
	configs/common.mk