doas.conf example - add persist?

Hi All,

Now that doas.conf supports the persist keyword, I suggest adding it to
the /etc/examples/doas.conf file.

The persist keyword was added in openBSD 6.1:
https://www.openbsd.org/61.html


https://man.openbsd.org/doas.conf.5#persist

http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/etc/examples/doas.conf?rev=1.1&content-type=text/plain&only_with_tag=MAIN


Thanks for the time.