[patch] remove some exports from glib bindings

[Havoc Pennington]

Definitely a good idea. The dbus_g_init_internal() thing is pretty
suspect I think though. Just make any function that depends on
initialization call it automatically ... you can skip functions that
depend on other functions being called first, e.g. you would never need
to init in a method on an object since the new() will have been called
first and you could init there. So in practice usually you don't have to
call init() in that many places.

Havoc