Don't involve code waiting for blocking channel in locked critical
section because it has potential risk of hanging forever.
Signed-off-by: Zhang Wei <zhangwei555@huawei.com>
So other packages don't need to import the daemon package when they
want to use this struct.
Signed-off-by: David Calavera <david.calavera@gmail.com>
Signed-off-by: Tibor Vass <tibor@docker.com>
