Makefile: stop syncing submodules automatically.
Makefile: stop syncing submodules automatically.

Now that it uses http URLs by default, I would like to keep changed URLs
(via `git/hub remote set-url -p origin blueyed`).

blueyed/dotfiles,scorpiovn/dotfiles,blueyed/dotfiles,scorpiovn/dotfiles,blueyed/dotfiles,scorpiovn/dotfiles,scorpiovn/dotfiles,blueyed/dotfiles,scorpiovn/dotfiles,blueyed/dotfiles