Use a global mutex for all nice agents and use g_source_is_destroyed to avoid the race condition of a source being destroyed while we wait for the mutex

Use addr instead of base_addr for assigning remote foundation for remote peer-reflexive candidates. addr will always be defined but base_addr won't always be

Add support for droping packets when using TCP and the bandwidth is too slow for the data output. The queue now has a limit of 20 packets and the tcp-turn now has to call send in a single shot to avoid dropping parts of the packet (dropping the length but send the data, or dropping only the padding at the end, etc..)

properly set remote candidates for delayed answer test, also include the delayed answer test in the google mode testing

should avoid a race condition where a remote candidate is taken as a peer reflexive and we loose its user/pass settings

Attempt to work around binding responses with no mapped address to have interop with gtalk2voip.com ICE implementation. Thanks to wahjava for reporting the issue

Make the upnp timeout 200ms so that it doesn't lag too much and so that it works correctly once gupnp-igd 0.1.3 is released

Hopefully fix a race condition when disposing of the turn socket and the timer to forget the sent request transaction ids