Move network initialization to network package

Signed-off-by: Alexandr Morozov <lk4d4@docker.com>
Merge remote-tracking branch 'remotes/LK4D4/new_brave_network' into extensions

Conflicts:
	daemon/container.go
	daemon/daemon.go
[WIP] Saved state in the middle of refactoring networking

Signed-off-by: Solomon Hykes <solomon@docker.com>