From: Jonathan McDowell <noodles@earth.li>
Date: Wed, 8 Jun 2016 11:35:10 +0000 (+0100)
Subject: Add stacked backend
X-Git-Tag: onak-0.5.0~24
X-Git-Url: http://the.earth.li/gitweb/?a=commitdiff_plain;h=a04a68c405b6927a6b4fdf9682f697847036ecf7;hp=a04a68c405b6927a6b4fdf9682f697847036ecf7;p=onak.git

Add stacked backend

This backend takes advantage of the new configuration file flexibility
to enable the stacking of multiple backends together, with each being
tried in turn until the desired keys are found. All stores go to the
first configured backend, and fetches from subsequent backends are
also stored in the first backend.
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