add directives for SSL server blocks

Author: salonichf5

internal/mode/static/nginx/config/servers_template.go

@@ -22,6 +22,7 @@ server {
     listen {{ $s.Port }} ssl;
     ssl_certificate {{ $s.SSL.Certificate }};
     ssl_certificate_key {{ $s.SSL.CertificateKey }};
+    proxy_ssl_server_name on;
 
     if ($ssl_server_name != $host) {
         return 421;