add support for generic streams

defaults/main.yml

@@ -9,6 +9,7 @@ nginx:
   snakeoil_default: false
   upstreams: {}
   vhosts: {}
+  streams: {}
   maps: {}
   resolver:
     - 8.8.8.8
@@ -44,6 +45,13 @@ nginx_vhosts_defaults:
   hide_proxy_headers: {}
   backend: ~
 
+nginx_streams_defaults:
+  listen:
+    custom: []
+  includes: []
+  proxy_pass: ~
+  proxy_protocol: "off"
+
 nginx_forcessl_vhost:
   "https-redirect":
     listen: