Bro 1.5.1 release now available

Two problems emerged with the original Bro 1.5 release a couple of days
ago: (1) the distribution failed to include aux/broctl (the new BroControl
framework), and (2) installations on systems with Python 2.4 failed
unnecessarily. These should both be fixed with the 1.5.1 update, now
available at:

- Vern