MINOR: bind: add alpn option to binds

Author: mjuraga

build/haproxy_spec.yaml

@@ -681,6 +681,10 @@ definitions:
         address:
           pattern: ^[^\s]+$
           type: string
+        alpn:
+          pattern: ^[^\s]+$
+          type: string
+          x-display-name: ALPN Protocols
         name:
           pattern: ^[^\s]+$
           type: string

models/haproxy.yaml

@@ -486,6 +486,10 @@ bind:
       x-dependency: 
         ssl: 
           value: true
+    alpn:
+      type: string
+      x-display-name: ALPN Protocols
+      pattern: '^[^\s]+$'
     verify:
       type: string
       enum: [none, optional, required]