libnss-rainbow2 0.8.7-2 (s390x binary) in ubuntu xenial

 Rainbow is a isolation shell which implements portions of the Bitfrost
 security architecture, as used on the OLPC XO-1 and elsewhere.
 .
 This package contains an "Name Service Switch" plugin for glibc which
 permits Rainbow to easily create and remove users and groups without
 modifying /etc/passwd and /etc/group.