* src/modest-defs.h:

* src/modest-defs.h:
        * Add (hidden) setting to enable fetching external images in
          html messages.
* src/widgets/modest-gtkhtml-mime-part-view.c:
        * Now it fetches external images from http servers, if allowed
          in a hidden setting. It does the fetch asynchronously so that
          it's retrieved after showing the message.
* src/modest-init.c:
        * Default value of fetching external images is false.

pmo-trunk-r3953