[Bro-Dev] New logging architecture

[Jonathan Siwek]

> Another good point. Is there a good reason to keep inproc streams PUSH
> / PULL if inter-process communications use PUB / SUB?

The PUB socket has the potential to drop messages when a high-water mark
is reached for a subscriber.  That didn't seem acceptable for inproc.
(BTW, I don't know exactly how HWMs are defined, I was just glancing at
the "zmq_socket" man page).

- Jon