Merge pull request #440 from wallabag/impr/nginx-dualstack

Support dualstack listen on nginx

root/etc/nginx/nginx.conf

@@ -35,8 +35,7 @@ http {
     }
 
     server {
-        listen 80;
-        listen [::0]:80;
+        listen [::]:80 ipv6only=off;
         server_name _;
         root /var/www/wallabag/web;