Fix issue with usetoken=0 trying to use a token

[ddechant]

This fixes an issue that occurs if the usetoken request parameter is defined, but is set to a false value.

Currently, when a request is made to download a torrent file, this condition will only check to see if the usetoken request parameter is set, it will not verify that it is true.

This fix will ensure that the parameter is a true value before attempting to use a token.