Binary package “libpam-cap” in ubuntu xenial

POSIX 1003.1e capabilities (PAM module)

 Libcap implements the user-space interfaces to the POSIX 1003.1e capabilities
 available in Linux kernels. These capabilities are a partitioning of the all
 powerful root privilege into a set of distinct privileges.
 This package contains the PAM module for enforcing capabilities on users and
 groups at PAM session start time.