Option to return image httpUrl instead of url as image src when inserting to textarea field

[pogidude]

I use ckeditor for my textareas. Now, I'd like to ask if it'd be possible to include in core to have it so that when an image is inserted into the textarea, the image src is the absolute uri instead of relative to root.

Basically, in ProcessPageEditImageSelect::executeResize() method, the src of the returned image can be set to $image->httpUrl instead of just $image->url. 

With that in place, we can now ask authors of the ckeditor module to add an option to be able to return absolute uri or use default of root relative uri.

Now, please, no discussions about merits of absolute vs relative urls. I'm for relative urls, but I need absolute urls for this project and I'd prefer not to hack core if I can.