Convert image all 5.3

As a photo intensive forum due to the nature of the topic we cover this addon is great, it has saved us a few times when photosharing sides have good offline and all our images are stored locally, recommended if you have long standing historical threads that you do not want to loose.

Really good addon :)
I slightly modified the code to take into account dead images, and I modified the update template to add an auto refresh (with more than 16 000 posts, it was impossible to do it manually). Works like a charm !

I'm surprised this hasn't been downloaded more. There is nothing worse than someone hotlinking to a site that isn't using HTTPS which leaves my showing as insecure etc,