Resuming clones

> Wait... y'all remember the time when Git repos could be accessed by Dumb HTTP, i.e. without /usr/libexec/git/git-http-backend?

I think that still works. I recently put some git repos for openscad sources for 3d prints up on a server. I currently do pulls to get updates from the source repos I work in. I found out you need run update-server-info to update the refs or cloning won't work. I used post-update.sample as a post-merge hook to do that automatically when I do pulls. I tested cloning using http and it seems to work properly.