Changed
- Update all package URLs to new EOL domain (@mho-CL & @jaredledvina)
- Update README with EOL status of Sensu Core (@jaredledvina)
- Debian/Ubuntu: Upgrade Erlang to 21.3 for compatibility w/ rabbitmq-server (@jaredledvina)
- Fedora/CentOS: Ensure chkconfig is installed for Uchiwa support on Fedora 30