Glenn Johnson b51be2bb1b Have fetch use list_url ... This PR allows archive file retrieval from urls derived from the `list_url` setting in a package file. This allows for continued retrieval of checksummed archive files even when they are moved to a new remote location when a package is updated upstream.		2016-07-23 19:09:58 -05:00
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spack	Have fetch use list_url	2016-07-23 19:09:58 -05:00