(cyrillic-koi8-r-decode-table): New

(cyrillic-koi8-r-decode-table): New
variable.
(cyrillic-koi8-r-encode-table): Likewise.
(ccl-decode-koi8): Use cyrillic-koi8-r-decode-table.
(ccl-encode-koi8): Use cyrillic-koi8-r-encode-table.
(ccl-encode-koi8-font): Likewise.
(cyrillic-koi8-r-nonascii-translation-table): New variable.
("Cyrillic-KOI8"): Add nonascii-translation-table and
charset-origin-alist properties.
(cyrillic-alternativnyj-decode-table): New variable.
(cyrillic-alternativnyj-encode-table): Likewise.
(ccl-decode-alternativnyj): Use
cyrillic-alternativnyj-decode-table.
(ccl-encode-alternativnyj): Use
cyrillic-alternativnyj-encode-table.
(ccl-encode-alternativnyj-font): Likewise.
(cyrillic-alternativnyj-nonascii-translation-table): New variable.
("Cyrillic-ALT"): Add nonascii-translation-table and
charset-origin-alist properties.