I think this is more convenient because for working with namespaces we
using configs.NamespaceType.
Signed-off-by: Alexander Morozov <lk4d4@docker.com>
Currently we have a problem when buffers are used for std file
descriptors. These buffers are filled from goroutines (Cmd.goroutine),
and we need to wait them to be sure that all data have been copied.
Signed-off-by: Andrew Vagin <avagin@openvz.org>