Disable PrivateDevices in systemd as it doesn't work for some devices (#1990)

dist/init/linux-systemd/caddy.service

@@ -30,8 +30,8 @@ LimitNPROC=512
 
 ; Use private /tmp and /var/tmp, which are discarded after caddy stops.
 PrivateTmp=true
-; Use a minimal /dev
-PrivateDevices=true
+; Use a minimal /dev (May bring additional security if switched to 'true', but it may not work on Raspberry Pi's or other devices, so it has been disabled in this dist.)
+PrivateDevices=false
 ; Hide /home, /root, and /run/user. Nobody will steal your SSH-keys.
 ProtectHome=true
 ; Make /usr, /boot, /etc and possibly some more folders read-only.