We opened a ticket with RHEL Support to ask when they would upgrade to at least HAProxy 1.7. This was their reply:
Most recent comment: On 2018-05-01 10:22:28, Patil, Ravindra commented: "Hello The reason 1.7 (as well and 1.6 and 1.8) are not in RHEL is due to backward compatibility. We can't simply rebase haproxy in RHEL to the latest release -- we would break existing deployments. This is a non-starter. We have added haproxy 1.8 to RHSCL 3.1 which should be released soon. But it will never been in base RHEL. There are no defects in 1.5. It is extremely stable. Far more stable that 1.7 or 1.8. Regards Ravindra Patil Red Hat Global Support Comments?

