setup.py: RHEL support needed for startup service

[crashingstatic]

Lines 119-120 in setup.py read:

                subprocess.Popen(
                    "update-rc.d artillery defaults", shell=True).wait()

On install for RHEL systems, setup.py stdout reads:

/bin/sh: update-rc.d: command not found

Recommendation:
Add a check to see if you're on a RHEL system, if so, then:

                subprocess.Popen(
                    "chkconfig artillery on", shell=True).wait()

Problem:
It appears that some versions of Fedora (i.e. FC-Sever 31) do not have either installed. Maybe instead of the above, create a systemd service?