vsu

let s:locale_encoding = &encoding
let &termencoding = s:locale_encoding
let &encoding = 'utf-8'

let &fileencodings = 'ucs-bom,ascii,utf-8,' . s:locale_encoding

au BufNewFile *
      \ let &l:fileencoding = s:locale_encoding

au BufReadPost *
      \ if &l:fileencoding == 'ascii' |
      \   let &l:fileencoding = s:locale_encoding |
      \ endif