rewrite: update default dumb and smart prefixes

rewrite: update default dumb and smart prefixes

DELETED:

* dumb {b}, smart {bb, bb_fr_en, bb_en_fr}: Redirects to Microsoft
  Translator, which I can't get to work without JavaScript.  Deleted.

* dumb {pyhelp}, smart {py, pydev}: Deleted as recommended by the
  author of the CGI script.

* dumb {pyvault, lyrics}, smart {pyvault}: Can't find a new URL for the
  service.  Deleted.

* smart {gd}: Google Directory has been shut down.  Deleted.

* smart {sd, sdc, sdu, sdp, sdj, whatis}: These don't seem to work
  without JavaScript.  Deleted.

* smart {id, draft}: The search still exists but I can't get it to
  take the words from the URL.  Deleted.

UPDATED:

* dumb {cia}: Had changed its URL, and the service is down, but they
  intend to restore it.  Updated and kept.

* dumb {lua}: ELinks no longer supports Lua 4.0.  Changed to 5.1 as
  installed by Debian.

* smart {cliki, foldoc, gwho, gwhat, gwhere, gwhen, a, imdb, wn, fsd,
  rfcs, cr}: Updated URLs.