Commit 16d220cb6fa23a16733b292eee7008097f5570eb

Azat Khuzhin 2016-08-11T13:43:14

test: replace sleeping with syncing pair in main/fork About this syncing pair: - read endpoint, must be blocked, to make it a checkpoint or smth like this - write endpoint, must be nonblocking, to avoid readcb hung Refs: #387