Unarchive blueprints that may be used again soonish

wiki/src/blueprint/evaluate_Docker.mdwn

-[[!tag archived]]
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 For an overview of the more general problem, see [[blueprint/replace_vagrant]].
 For the detailed plans and things to evaluate in Docker, see [[!tails_ticket 7530]].
 

wiki/src/blueprint/replace_vagrant.mdwn

-[[!tag archived]]
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 [[!meta title="Replacing Vagrant?"]]
 
 [[!toc levels=2]]