This demos what happens when unzipping nonportable filenames on
Windows; most illegal characters are converted to "_" but "\" 
generates subfolders (this is an inherent caveat in both ziptools 
and the underlying Python zipfile module).  Use the fixer script 
on Unix, even for manual zips created outside this system's scripts.

NOTE: this example was not rerun for Mergeall 3.3, so its logfile
content differs slightly from the current release.