Add reusable text snippet with a short hardware checklist
Add reusable text snippet with a short hardware checklist

As recommended in http://tychoish.com/post/large-sphinx-deployments/
the filename of the included text is .txt, not .rst.

ehartsuyker/securedrop,conorsch/securedrop,garrettr/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,conorsch/securedrop,conorsch/securedrop,garrettr/securedrop,micahflee/securedrop,heartsucker/securedrop,heartsucker/securedrop,conorsch/securedrop,ehartsuyker/securedrop,micahflee/securedrop,garrettr/securedrop,garrettr/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,conorsch/securedrop,micahflee/securedrop,heartsucker/securedrop,micahflee/securedrop