Ian Wienand fa51d4e0a3 Add some details for various cloud config files
It's definitely not a priori evident what all these configs that seem
to duplicate each other do; add some inline documentation to each to
hopefully explain what's going on a little more clearly for people
unfamiliar.

Change-Id: I0cc2e8773823b7d9b47d3dfd4c80827cd9929075
2018-09-05 11:23:23 +10:00
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