Now our registry is used only for building other things in a special way. Would be nice if cargo will requiest foo-1 and it's in that registry, it will be used instead of downloading official archive and using it.

• It saves bandwidth
• Already without bundled libraries
• We have quite good amount of patches to switch dependencies to their latest version which makes stuff more secure and also saves bandwidth (instead of versions X, Y, Z will be used only one)

Not sure how to achieve that (probably some RFC is needed).