This commit also brings in the ability to specify a default network and its
corresponding driver as daemon flags. This helps in existing clients to
make use of newer networking features provided by libnetwork.
Signed-off-by: Madhu Venugopal <madhu@docker.com>
Upstream-commit: da5a3e6dee80f1f5d4059851e4762ffb0484f7e9
Component: engine
