These profile entries define the limits on system resources
       (rlimits) for the processes inside the sandbox.  The limits can
       be modified inside the sandbox using the regular ulimit command.
       cpu command configures the CPU cores available, and cgroup
       command place the sandbox in an existing control group.
       Examples:
       cgroup /sys/fs/cgroup/g1/tasks
              The sandbox is placed in g1 control group.
       cpu 0,1,2
              Use only CPU cores 0, 1 and 2.
       nice -5
              Set a nice value of -5 to all processes running inside the
              sandbox.
       rlimit-as 123456789012
              Set the maximum size of the process's virtual memory to
              123456789012 bytes.
       rlimit-cpu 123
              Set the maximum CPU time in seconds.
       rlimit-fsize 1024
              Set the maximum file size that can be created by a process
              to 1024 bytes.
       rlimit-nproc 1000
              Set the maximum number of processes that can be created
              for the real user ID of the calling process to 1000.
       rlimit-nofile 500
              Set the maximum number of files that can be opened by a
              process to 500.
       rlimit-sigpending 200
              Set the maximum number of processes that can be created
              for the real user ID of the calling process to 200.
       timeout hh:mm:ss
              Kill the sandbox automatically after the time has elapsed.
              The time is specified in hours/minutes/seconds format.