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A usefull and powerfull script. This script is used if you have
many files located on a other web server (filestorage) and you link
to them on your page for download. When the location of the used
filestorage web space changes often, you always have to edit your full
linking page and change every link. With this script you only have to
edit one line (the base URL) and all the links on the page where
updated to the new location automatically.