(LFACE_FOUNDRY): New macro.

(LFACE_FOUNDRY): New macro.
(check_lface_attrs): Check foundry.
(set_lface_from_font): Don't parse "FOUNDRY-FAMILY" from.
(merge_face_vectors): Check foundry.
(merge_face_ref): Likewise.
(Finternal_set_lisp_face_attribute): Likewise.
(x_update_menu_appearance): Likewise.
(Finternal_get_lisp_face_attribute): Likewise.
(lface_hash): Likewise.
(lface_same_font_attributes_p): Likewise.
(x_supports_face_attributes_p): Likewise.
(tty_supports_face_attributes_p): Likewise.
(Finternal_set_alternative_font_family_alist): Intern strings.
(Finternal_set_alternative_font_registry_alist): Downcase strings.
(realize_default_face): Set LFACE_FOUNDRY (lface).