missing 1251

Version: 21.5 from cvs During "The big ben-mule-21-5 check-in!" `windows-1251' implementation was removed from `cyrillic.el'. The comment says that XEmacs has automatic support. I do not observe this. There is nothing containing `1251' in list of available coding systems. Even if coding system itself is made available somehow - corresponding `Cyrillic-Win' language environment has to be defined manually, since it is not coding system alone. Such a definition was in previous version of `cyrillic.el', and should be returned there.