Add Security -> Bro

Bro is a powerful framework for network analysis and security monitoring. 

-> [Github Repo](https://github.com/bro/bro)
-> [Website](http://www.bro.org)

README.md

@@ -451,6 +451,7 @@ Comparison of NoSQL servers: http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-v
 *Security tools.*
 
 * [Blackbox](https://github.com/StackExchange/blackbox) - Safely store secrets in Git/Mercurial. Provides tooling to automatically encrypt secrets like passwords.
+* [Bro](http://www.bro.org) - Bro is a powerful framework for network analysis and security monitoring. 
 * [Denyhosts](http://denyhosts.sourceforge.net/) - Thwart SSH dictionary based attacks and brute force attacks.
 * [Fail2Ban](http://www.fail2ban.org/wiki/index.php/Main_Page) - Scans log files and takes action on IPs that show malicious behavior.
 * [fwknop](https://www.cipherdyne.org/fwknop/) - Protects ports via Single Packet Authorization in your firewall.