Comment 25 for bug 85579

This patch only supports 7bit ASCII and the 1st problem described above is also
fixed:

  Folder 'a,b' contains a subfolder 'a?b' and you rename 'a,b' to 'ab'.

In addtion, the problem of not showing the correct folder display names when
panacea.dat is missing or corrupted is fixed.

One new problem that was discovered and has not been fixed is folder names with
slash(es) (like 'a/b'). For now, code is added to disallow folder names with
slash(es) to be created or renamed. An error dialog is displayed in this case.
I'll file a new bug against it.

I'll also have to try the patch on linux and mac to see if I need to change the
special char list in CheckIfContainsSpecialChars() (ie, to see if there are any
chars that don't work on these two platforms). Loading the latest code now.