Code review for 6811297: Add more logging to HTTP protocol handler

[Jean-Christophe Collet]

Here is proposal to add more debugging tool for the HTTP protocol handler.
This adds more logging, a formatter for the logs and a traffic capture tool.
These changes have no implications on normal operation, they just add 
features that can be turned on when investigating bugs.

A webrev is available at 
http://cr.openjdk.java.net/~jccollet/6811297/webrev.00/

Thanks,