fix default server

nginx/opennet.ru/yggbro/opennet.ru/server.conf

@@ -1,12 +1,15 @@
 server {
 
   # HTTP/IPv6 connections only
-  listen [::]:80;
+  listen [::]:80 default_server; # make sure default_server not exists or throw an exception
 
   # Yggdrasil connections only
   allow 0200::/7;
   deny all;
 
+  # Listen defaults
+  server_name _;
+
   # Include handles
   include /etc/yggbro/nginx/opennet.ru/yggbro/opennet.ru/handles/redirect.conf;
 

nginx/texty.org.ua/yggbro/texty.org.ua/server.conf

@@ -1,11 +1,14 @@
 server {
 
-  # HTTP/IPv6 only
+  # HTTP/IPv6 connections only
-  listen [::]:80;
+  listen [::]:80 default_server; # make sure default_server not exists or throw an exception
 
-  # Yggdrasil only
+  # Yggdrasil connections only
   allow 0200::/7;
-  deny  all;
+  deny all;
+
+  # Listen defaults
+  server_name _;
 
   location /yggbro/texty.org.ua {