Add query for FOLDOC -- Free On-line Dictionary of Computing

dotfiles/saturnin/www.ini

     d       = http://www.collinsdictionary.com/dictionary/english/%s
     dd      = http://devdocs.io/%s
     deb     = https://packages.debian.org/search?keywords=%s
+    fd      = http://foldoc.org/%s
     g       = http://www.google.com/search?q=%s
     ma      = http://www.mapy.cz/?q=%s
     oh      = https://www.openhub.net/p?q=%s