Here are my UTF-8 patches for Midnight Commander (complete package).

• mc-4.6.0-utf8.patch
  The original UTF-8 patch from RedHat
• mc-4.6.0-utf8-input.patch
  UTF-8 support in input widget, editor and viewer
• mc-4.6.0-utf8-fix.patch
  Fixes to mc-4.6.0-utf8.patch
• mc-4.6.0-utf8-hints.patch
  Display hints in correct charset
  

These patches requires slang with UTF-8 patches.
Here is an older version of the patches.