Fully document #193 stream module

pillar.example

@@ -110,6 +110,7 @@ nginx:
         access_log: []       #suppress default access_log option from being added
 
         ### module nngx_stream_core_module
+        ### https://docs.nginx.com/nginx/admin-guide/load-balancer/tcp-udp-load-balancer/#example
         stream:
           upstream lb-1000:
             - server:
@@ -119,6 +120,26 @@ nginx:
             listen: 1000
             proxy_pass: lb-1000
 
+          upstream stream_backend:
+            least_conn: ''
+            'server': 'backend1.example.com:12345 weight=5'                       #one way
+            'server backend2.example.com:12345 max_fails=2 fail_timeout=30s': ''   
+            'server backend3.example.com:12345 max_conns=3': ''                   #another way
+          upstream dns_servers:
+            least_conn:
+            'server 192.168.136.130:53': ''
+            'server 192.168.136.131:53': ''
+            'server 192.168.136.132:53': ''
+
+          'server ':
+            listen: '53 udp'
+            proxy_pass: dns_servers
+
+          'server  ':
+            listen: 12346
+            proxy_pass: backend4.example.com:12346
+
+
 
     servers:
       disabled_postfix: .disabled # a postfix appended to files when doing non-symlink disabling