Separate nginx sockets for each site to make hoster identification harder

etc/systemd/system/nginx.service.d/custom.conf

@@ -3,3 +3,4 @@ LimitNOFILE=100000
 TimeoutStartSec=300
 ExecStop=
 ExecStop=-/sbin/start-stop-daemon --quiet --stop --pidfile /run/nginx.pid
+ExecStartPre=/usr/bin/install -Z -m 02755 -o www-data -g www-data -d /var/run/nginx