dns/dnsmasq: security update to v2.85 release
Changelog:
https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=blob_plain;f=CHANGELOG;hb=v2.85
Configurations where server lines contain a @ character,
f.i. server=1.1.1.1@em0 or server=1.1.1.1@192.0.2.1, disabled
source port randomization, making cache poisoning attacks possible.
v2.85 mitigates this.
MFH: 2021Q2
Security: CVE-2021-3448
Security: 5b72b1ff-877c-11eb-bd4f-2f1d57dafe46 (VuXML)