randomizing fetch sites (was: 1 unfetchable distfile)

[Robert Huff]

Kris Kennaway writes:

>  Try to add another mirror.

	Speaking of which ....
	Is there any way to get fetch to try mirror sites in other than
the order listed?
	Case: when building programs hosted on Sourceforge, some of the
SF mirrors are _creaking_ slow.  By manually fetching with a
different site I can reduce download time from (in extreme cases)
hours to minutes.
	I /could/ edit the list of Sourceforge mirrors, but I'd prefer
not to meddle unless there's no better solution.


					Robert Huff