bug#18051: 24.3.92; ls-lisp: Sorting; make ls-lisp-string-lessp a normal function?

[Glenn Morris]

You don't know how this feature will be used, because you just added it.
Sometimes people will want to use it to "sort in the user's specified
locale", sometimes they will want to use it to "sort according to some
specific locale". An optional argument defaulting to LC_COLLATE makes
both uses easy. (Adding a global lisp variable that overrides LC_COLLATE
seems pointless but harmless to me.)

Anyway, at this point I give up trying to get an optional argument added
to a function.