fnmatch changes

[Ulrich Drepper]

I've checked in the fnmatch changes I worked on the last days.  These
changes are necessary to allow bash using the fnmatch in glibc which
in turn is necessary to have bash handle all the internationalization
issues correctly (and being consistent).  The changes are low-risk
since unless the new flag is used the code behaves the same.  One
exception: I fixed a bug.  So it is good to have the new code in any
case.

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