A much quieter cycle for documentation (happily), with, one hopes, the bulk

of the churn behind us.  Significant stuff in this pull includes:

 - A set of new Chinese translations
 - Italian translation updates
 - A mechanism from Mauro to automatically format Documentation/features
   for the built docs
 - Automatic cross references without explicit :ref: markup
 - A new reset-controller document
 - An extensive new document on reporting problems from Thorsten

That last patch also adds the CC-BY-4.0 license to LICENSES/dual; there was
some discussion on this, but we seem to have consensus and an ack from Greg
for that addition.
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