(Qvalid_codes): New variable.
(coding_category_name): Include "coding-category-ccl". (detect_coding_ccl): New function. (setup_coding_system): Setup coding->spec.ccl.valid_codes from the coding system priority `valid-codes' for CCL based coding systesm. (detect_coding_mask): Check also a CCL based coding system. (Fupdate_coding_systems_internal): Renamed from Fupdate_iso_coding_systems. (syms_of_coding): Change property char-table-extra-slot of translation-table to 1. Initialize and static pro Qvalid_codes.
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