Fixing the  "Unable to clone" problem when running drush make on ding2.make

When trying to build from ding2.make, I encountered a lot of "Unable to clone" errors, as in 

"Unable to clone alma from git@github.com:ding2/alma.git.  [error]"

I was able to git clone manually, so I figured the problem was with drush make. I found the following note in
http://drupal.org/node/1440668#comment-5640538:

"I finally tracked this down. The issue is not with Drush make or the format we are currently using - it's simply because we are using git:// and not http:// when fetching our repos.This works well for most people, but if you are behind a firewall that does not allow traffic on the port that git is using, you can't download anything from drush make, or clone anything using git:// for that matter. [..]"

I suspect I have experienced exactly the issue described above.

My change is to make all repo URLs of the form "http(s)://" instead of "git://" - and it starts to build. However, errors still appear when the .make-files in the repos are parsed. Is there any problem adjusting the make-files in all ding-repos to list the git URLs in the same way as in this pull-request?