(GH-19) Deprecated get_default_dbh().
(GH-19) Deprecated get_list_cache_time().
(GH-19) Deprecated get_memcache().
(GH-19) Deprecated get_object_cache_time().
(GH-19) Deprecated get_primary_key_name().
(GH-19) Deprecated get_readonly_fields().
(GH-19) Deprecated get_table_name().
(GH-19) Deprecated get_unique_fields().
(GH-19) Deprecated has_created_field().
(GH-19) Deprecated has_modified_field().