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(struct iso2022_spec): New member.
last_invalid_designation_register.
(struct coding_system): New member inhibit_inconsistent_eol_type.
(CODING_CATEGORY_IDX_ISO_7_TIGHT,
CODING_CATEGORY_MASK_ISO_7_TIGHT): New macros.
(CODING_CATEGORY_MASK_ANY): Include
CODING_CATEGORY_MASK_ISO_7_TIGHT.
(coding_category_table, coding_category_name): Extern deleted.
(Vselect_safe_coding_system_function): Extern it.

(CODING_FINISH_XXX): New macros.
(CODING_MODE_XXX): New macros.
(struct coding_system): New member mode, category_idx,
heading_ascii.  Deleted members last_block, direction, selective,
carryover, carryover_size.
(CODING_MAY_REQUIRE_DECODING): New macro.
(CODING_CATEGORY_MASK_ISO_7BIT, CODING_CATEGORY_MASK_ISO_8BIT,
CODING_CATEGORY_MASK_ISO_SHIFT, CODING_CATEGORY_MASK_ISO): New
macros.
(Qraw_text): Extern it.