ConfigMap: add options to set ssl-engine and ssl-mode-async

[mythi]

Some deployments may have the access to an OpenSSL engine to benefit
from, e.g., TLS offloading to a hardware engine.

Add new ConfigMap options to be able to more easily configure HAproxy
to use the engines available.

[bedis]

This is a wonderful feature, allowing HAProxy to benefit from HW accelerated devices for SSL processing.
+1

[jcmoraisjr]

Nice, thanks! Merging.

Note however that this same feature can also be used right now (since v0.7) configuring ssl-engine and ssl-mode-async with config-global configmap option.

[mythi]

@jcmoraisjr thanks! I learnt about config-global after I had my patch implemented. I believe the engine feature is more visible this way and helps to increase the adoption.

[jcmoraisjr]

Hi @mythi , just saw your blog post. Thanks for choosing HAProxy and haproxy-ingress!

[mythi]

@jcmoraisjr sure thing, it was the most straightforward path to enable the use case