Created attachment 5343 [details]
Please include the 'petr1708' locale variant (registered in Dec 2010), representing Russian orthography before 1918. It should facilitate processing of texts of said period.
Attached locale contains a proper sorting order and transcribed LC_TIME section for sake of completeness. Obviously other parts has no bearing to its purpose and linked to modern ru_RU values.
Created attachment 5651 [details]
Created attachment 5655 [details]
Accepting any such special-interest locale would open a flood. There is no reason to have such a locale in glibc. The localedef utility is standardized for a reason: locales can be compiled by anyone.
Just create a RPM or whatever which upon installation installs the files and compiles the locale with localedef.