* configure.in,
  acconfig.h: Add support for setting a reasonable default for
  MOZILLA_FIVE_HOME - which mozilla needs to survie.

  * components/mozilla/main.c: (mozilla_setup_environment) Add a
  function to hack the mozilla environment into something that might
  have a chance of working by default.

  * src/ntl-uri-map.c: Add a temporary hack protocol moz:// to test
  mozilla in isolation from gnome-vfs trying to do http stuff.