Bug#631605: don't make file chooser case sensitive by default

[jidanni at jidanni.org]

Package: iceweasel
Version: 6.0~a2+20110615042007-1
Severity: wishlist

There I was on a certain website (which I already forgot), trying to
upload photos.

Because iceweasel's upload file chooser is case sensitive, and the site
told it to select  *.jpg, *.gif, etc. I had to do
mv DSCN3291.JPG DSCN3291.jpg
mv DSCN3292.JPG DSCN3292.jpg
before I was able to select any of my pictures.