Axel Huebl f5844d3d81 all_urls: add urls[0] for versions (#16435) ... This adds the `url` alternative `urls` to `package.all_urls`. With this addition, one can find again new versions with `spack versions <package>` for packages that are populated with from mixin mirror `urls`. Example: `util-macros` from x.org mixin.		2020-05-08 10:12:45 +02:00
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spack	all_urls: add urls[0] for versions (#16435)	2020-05-08 10:12:45 +02:00