rustc: move the method and vtable maps into ty::ctxt.
rustc: de-@ method and vtable maps.
rustc: de-@ ty::AutoAdjustment.
rustc: remove unused errors_reported field from regionck.
rustc: make MemCategorizationContext immutable.
rustc: de-@ lang_items.
rustc: de-@ some RefCell's.
rustc: de-@ freevars.
rustc: de-@ lint.
rustc: de-@ resolve.
rustc: de-@ borrowck.
rustc: de-@ mem_categorization.
rustc: de-@ metadata::cstore.
rustc: de-@ trans::_match.
rustc: de-@ ty::ParamBounds.
rustc: remove obsolete monomorphization modes.
rustc: slightly optimize make_mono_id to not clone lots of vectors.
rustc: de-@ mono_id.
rustc: de-@ param_substs.
rustc: de-@ ty::type_err.