W3TC is awesome, been using it for a while and really love it. So thanks. Got a question about using CDNs.
From a CDN point of view, I've got images outside of WordPress that I want to replace with a CDN-compatible URL, using the CDN settings that are stored in W3TC. Since they're outside of WP, W3TC doesn't see them. But I specifically want to use the settings in W3TC to make life easier for the client.
From a technical point of view (I'm a WP developer), what's the best way to override the URL to use the CDN settings in your plugin?
2. Or something else?