Fixed error when connecting to 8083 over HTTP

Fixed error "400 The plain HTTP request was sent to HTTPS port"

By putting custom error page on http error coder 497 that redirects http
uri to https uri

src/rpm/conf/nginx.conf

@@ -82,6 +82,9 @@ http {
         root            /usr/local/vesta/web;
         charset         utf-8;
 
+        // Fix error "The plain HTTP request was sent to HTTPS port"
+        error_page      497 https://$host:$server_port$request_uri;
+
         ssl                  on;
         ssl_certificate      /usr/local/vesta/ssl/certificate.crt;
         ssl_certificate_key  /usr/local/vesta/ssl/certificate.key;