First shot proxy (unstable)

vars/main.yml

@@ -1 +1,24 @@
 nginx_dh_path: /etc/nginx/ssl/dhparams.pem
+
+nginx_upstream_server_params:
+  - key: 'weight'
+    default: 1
+  - key: 'max_fails'
+    default: 1
+  - key: 'fail_timeout'
+    default: '10s'
+  - key: 'backup'
+    is_bool: true
+  - key: 'down'
+    is_bool: true
+    default: false
+  - key: 'route'
+    default: 'configuration_error'
+  - key: 'slow_start'
+    default: 0
+  - key: 'max_conns'
+    default: 0
+    min_version: '1.5.9'
+  - key: 'resolve'
+    is_bool: true
+    min_version: '1.5.12'