Imported From: http://groups.google.com/group/in-portal-dev/browse_thread/thread/6842ee5be2c2f594#
Since In-Portal 5.1.0 new feature was introduced. This feature allows to
merge all js/css files on the page into one file and then compress it. This
allows to significantly enhance website loading time.
There is one problem though: old versions of compressed files are never
deleted.
Currently filename is generated by following scheme:
<d