<p>It looks <a href="https://github.com/openstreetmap/openstreetmap-website/commit/dbe165bbb3d6eda37d9579f1ac767599f9055607#diff-3ef1e2237f323b7d4dc1ce1fc11a5c20R13">this refactoring</a> has broken what used to be a very useful feature: Allowing the submission of a Callback URL with a custom URL scheme (e.g., myapp://somewhere) when creating an app. It's now back to limiting Callback URLs to http/https.</p>

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