Removing secure-verify-ca-secret support and writing an error log if that annotation is used in an Ingress definition

docs/kubectl-plugin.md

@@ -121,11 +121,6 @@ $ kubectl ingress-nginx backends -n ingress-nginx
       }
     },
     "port": 0,
-    "secureCACert": {
-      "secret": "",
-      "caFilename": "",
-      "caSha": ""
-    },
     "sslPassthrough": false,
     "endpoints": [
       {

docs/user-guide/nginx-configuration/annotations.md

@@ -78,7 +78,6 @@ You can add these Kubernetes annotations to specific Ingress objects to customiz
 |[nginx.ingress.kubernetes.io/enable-rewrite-log](#enable-rewrite-log)|"true" or "false"|
 |[nginx.ingress.kubernetes.io/rewrite-target](#rewrite)|URI|
 |[nginx.ingress.kubernetes.io/satisfy](#satisfy)|string|
-|[nginx.ingress.kubernetes.io/secure-verify-ca-secret](#secure-backends)|string|
 |[nginx.ingress.kubernetes.io/server-alias](#server-alias)|string|
 |[nginx.ingress.kubernetes.io/server-snippet](#server-snippet)|string|
 |[nginx.ingress.kubernetes.io/service-upstream](#service-upstream)|"true" or "false"|