We are currently reevaluating which platforms we test Bro on, which
binary packages we distribute, and what dependencies we can require
for running future Bro versions.
To help us get a better idea on what platforms people are running Bro
on today, we'd like to ask you to fill out a short survey to tell us
about the OSs you are using:
https://www.surveymonkey.com/s/Bro_Usage
This shouldn't take longer than a couple minutes and is completely
anonymous (we don't record anything else than your answers. 
Thanks!
Robin