Add support for Hubic (www.hubic.com)

Thanks, I see the reason now. Still, in order to avoid copy-paste code, we could have a "localhostPolicy" property in o2.h, and set redictUri_ based on that, in o2.cpp. The property by default should indicate 127.0.0.1, but the O2Hubic constructor would set it to indicate localhost instead.

Will you give it a try?