From Stephan Huber, fix for building lua plugin from local source
From Stephan Huber, "attached is a fix for the rest-http-plugin which should fix the font-issue reported by Phil. The old implementation did forward all requests to the internal http-server via user-events. This prevented error-reporting for missing files, as the request was accidentally handled by the plugin. As a request for missing font-file succeeds and returned an empty file, the curl-plugin hands the data happily to the freetype-plugin which failed trying to load an empty font-file, obviously.

My fix was to rename the standard request handler to a specialized user-event-handler which handles only requests for "/user-event“

So fonts should work on iOS when loaded remotely, even when a local file is available and with the resthttp-plugin serving the presentation.
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