dns/dnsmasq-devel: update to v2.91rc3
* bceab45 2025-02-07 | Fix 0x20 problem.
Also fix ordering of chrony vs. dnsmasq (from dns/dnsmasq main port)
MFH: 2025Q1
dns/dnsmasq*: add a checkconfig option to rcfile
and automatically invoke it before restart or stop.
Under the hood, this runs dnsmasq --test.
Bump PORTREVISION of dnsmasq only, the -devel port is not
built regularly.
[commit message by Matthias Andree <mandree@FreeBSD.org>]