Update copyright for 2016

Tom Lane <tgl@sss.pgh.pa.us>

Commit: ad08bf5c8b96c2a3a70d96f5be1c04cb83b4ed6e
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2016-01-02T19:08:55Z
Releases: 9.6.0
Update copyright for 2016

Manually fix some copyright lines missed by the automated script.

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