I set up latest FS from master, and there seems to be a problem with the ICE handshake and establishing audio flow. 

The problem that I detected is that ICE setup takes 2 or more seconds to complete, and around 10% of the time it fails. Same SIPjs configuration works fine with my current setup, which is based on git 7cf1238 2015-08-07.

Is there anything that I need to configure or take into account for latest master?
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