ru-d1489

Cp866<->koi8-r and cp1251<->koi8-r decoders, font converter (RFC1489)

todos/fromdos: point-to-point cp866<->koi8-r decoder with CR/LF translation towin/fromwin: best match cp1251<->koi8-r decoder with CR/LF translation a2kfcnv: EGA/VGA raw screen fonts converter: cp866 font -> koi8-r font All programs written according to RFC 1489