PAM module to authenticate users running a Slurm job and track their processes

 The Slurm Workload Manager is an open-source cluster resource management and
 job scheduling system that strives to be simple, scalable, portable,
 fault-tolerant, and interconnect agnostic.
 Pluggable Authentication Module (PAM) for restricting access to compute
 nodes where Slurm performs resource management to users who have a
 running job. The user's connection is "adopted" into the "external"
 step of the job so that processes spawned are tracked and Slurm can
 perform a complete cleanup when the job is completed.