Add filter support for `network ls` to hide predefined network,
then user can use "docker network rm `docker network ls -f type=custom`"
to delete a bundle of userdefined networks.
Signed-off-by: Zhang Wei <zhangwei555@huawei.com>
Upstream-commit: 26dd026bd70c9c18a16b0e339821c309e56d8ff0
Component: engine