[Bro-Dev] 1.5.3?

[Vern Paxson]

> I'm thinking we should do a 1.5.3 release with these:

In general, fine with me.  However, what's up with #385?  I can't tell
from the ticket what problem it's addressing, or how.  (And if left out,
then the others are all thematically about cluster management, which if
made explicit would help folks who don't run clusters realize they don't
partiuclarly need to upgrade right now.)

		Vern