to have backward compatibility symbolic links.
This code should check existence of deprecated locales and
fix them using following scheme:
. if new locale directory exisists and is a symlink -- remove it
. if old locale directory exists and not a symlink -- rename it to
its new name
This should allow to mtree(1) and existing locale aliases make(1)
rules to setup locale dirs correctly (avoid self-referenced symlinks)
BTW, this commit brings in backward compatibility support for ru_SU
locales (aliased to appropriate ru_RU ones).
