[Dnsmasq-discuss] How to set umask for logfile?

[BUGHUNTER]

Hi,

I am trying to set the umask for the logfile generated by dnsmaq, but it seems to ignore the way I 
am doing it.

System: Ubuntu 16.04

/etc/dnsmasq.d/local.conf:
log-facility=/var/log/dnsmasq.log
log-queries

Then I am creating a systemd override like described here:
https://serverfault.com/questions/582371/how-to-set-umask-for-php-fpm-in-fedora

systemctl edit dnsmasq.service.
add:
[Service]
UMask=0002

systemctl reenable dnsmasq.service

The logfile is written, but the umask is not set as expected.

Questions:

Why is this setting ignored?

How can I set the umask I would like to have?

Thanks!
Bughunter