securityonion-elsa-extras: update bro_ssl parser for Bro 2.4

[dougburks]

https://groups.google.com/d/topic/security-onion-testing/4c9m_J5h2kE/discussion

[dougburks]

commit:
Security-Onion-Solutions/securityonion-elsa-extras@4717644

[dougburks]

submitted for testing:
https://groups.google.com/d/topic/security-onion-testing/g7GxUYk5T3c/discussion

[dougburks]

Published:
http://blog.securityonion.net/2015/08/bro-24-now-available-for-security-onion.html