[GRASS5] Case-sensitive filenames

I've just noticed that there are a few cases of filenames differing
only in case:

src/mapdev/v.digit/help:

  Customize._b Customize._B
  Customize._d Customize._D
  Edit._r Edit._R
  Label._a Label._A
  Label._l Label._L
  Label._m Label._M
  Label._s Label._S
  Toolbox._n Toolbox._N
  Window._a Window._A
  Window._c Window._C
  Window._l Window._L
  Window._s Window._S
  Window._w Window._W

[there are a few others, but they're in unused code.]

Obviously, this isn't going to work on Cygwin (maybe not on MacOS X
either).

--
Glynn Clements <glynn.clements@virgin.net>