Fabrice Bellet authored Apr 11, 2016 and Olivier Crête committed Jun 21, 2017

This patch adds another supplementary "corner" case, not covered by the
ICE spec, sect 8.1.2, "Updating States". A pair in waiting state and in
the triggered check list should be considered like an in-progress pair,
and cancelled only if its priority is lower than the priority of the
nominated pair. This is required in some aggressive nomination
situations for both peers to select the same pair, having the highest
priority.

Differential Revision: https://phabricator.freedesktop.org/D933