** file-cache-minibuffer-complete now accepts a prefix argument.<BR>
With a prefix argument, it does not try to do completion of
the file name within its directory; it only checks for other
directories that contain the same file name.
<P>
Thus, given the file name Makefile, and assuming that a file
Makefile.in exists in the same directory, ordinary
file-cache-minibuffer-complete will try to complete Makefile to
Makefile.in and will therefore never look for other directories that
have Makefile.  A prefix argument tells it not to look for longer
names such as Makefile.in, so that instead it will look for other
directories--just as if the name were already complete in its present
directory.
<P>