after Upgrade to 11.5 the "Enduser" can not change or edit *vhost.conf. Per FTP is the conf Folder not visible for Customer and the Fields in WebServer Settings is also not visible for Customer. How can the Customer now add own Rewrite Rules to Nginx?
All I can say is that it is not safe to give such option to customers. One can easily bring nginx down via using this feature if not careful. I wouldn't let my customers do that.