NGINX Ingress Controller 5.6: HSTS without snippets, a faster start on large clusters, and improved configuration safety

NGINX Ingress Controller 5.6 implements more support for configuring NGINX through resources instead of through snippets. HTTP Strict Transport Security (HSTS) becomes a first-class policy across VirtualServer, VirtualServerRoute, and Ingress. Two new annotations close configuration gaps for teams moving off Ingress-NGINX, and the X-Forwarded base headers can now be turned off through the ConfigMap.