Adding policies & bro.cfg

[sorry for the delay in following up on this]

There is an entry in the bro.cfg file for the 'start policy'. I am guessing
that this is not '' because that already lives in $BROHOME/etc
and apparently gets called automatically. What typically goes in the start

The convention we've used is that there's a file hostname.domain.tld.bro
(e.g., which corresponds to the specific config that's
running on the host hostname.domain.tld. This will for example load a
specific set of anlayzers and redef "interfaces" to match the particular
hardware used by the host.