ASP class to upload files
This class was published on http://www.freeaspupload.net but isn't anymore, the host is invalid nowadays.
Aug 2, 2005: Add support for checkboxes and other input elements with multiple values
Jan 6, 2009: Lars added ASP_CHUNK_SIZE
Sep 3, 2010: Enforce UTF-8 everywhere; new function to convert byte array to unicode string