Fixes #4659: adjusted nginx config in docs to serve 404 instead of "no input...

Fixes #4659: adjusted nginx config in docs to serve 404 instead of "no input file specified" when accessing non-existing PHP file

docs/guide/start-installation.md

@@ -179,6 +179,7 @@ server {
         include fastcgi.conf;
         fastcgi_pass   127.0.0.1:9000;
         #fastcgi_pass unix:/var/run/php5-fpm.sock;
+        try_files $uri =404;
     }
 
     location ~ /\.(ht|svn|git) {