Add avahi filtering feature to pfSense
Two parts to the issue;
1) Package needs to be updated from upstream to get new filtering feature added in avahi v0.8
2) Web-GUI in pfSense should be able to set new 'reflect-filters' setting
The filtering feature was added via this GitHub PR; https://github.com/lathiat/avahi/pull/62
Added in avahi v0.8. Latest port is 0.7_3, added in march 2020.