Update dillo to 3.0.4.

While here,
* move dependency on wget to TOOLS,
* simplify configuration file handling

dillo-3.0.4 [April 09, 2014]

+- OPTGROUP and INS elements.
- Some HTML5 elements, etc.
- Added show_ui_tooltip preference (BUG#1140).
  Patches: corvid
+- Make embedding into other applications more reliable (BUG#1127).
- Add search from address bar.
- Share CSS user agent stylesheet between pages.
  Patches: Johannes Hofmann
+- Better scaling (down) of images, even with consideration of gamma
  correction.
- Fixed (possibly security) problem of FltkImgBuf caused by integer overflow
  (BUG#1129).
- Some linebreaking fixes, and optimization for non-justified text, including
  new preference stretchability_factor.
- Added white_bg_replacement preference.
- Implemented background images (except 'background-attachment'), added
  load_background_images preference, as well as a new entry in the tools menu.
  Patches: Sebastian Geerken
+- Fix a set of bugs reported by Oulu Univ. Secure Programming Group
  (HTML parsing, URL resolution, GIF processing, etc.)
- Improved/fixed handling of HEAD, TITLE, TEXTAREA and form inputs.
- Made show_url dillorc option work again (BUG#1128)
  Patches: Jorge Arellano Cid
+- Fix compiling on Hurd.
  Patch: Pino Toscano
+- Avoid Dpid children becoming zombies.
  Patch: Jorge Arellano, J. Gaffney
+- HTML5 WBR element.
- Fix compiling on IRIX with MIPSpro compiler.
  Patches: corvid, Sebastian Geerken

(obache)