[Merge] ~ubuntu-server-dev/ubuntu/+source/percona-xtradb-cluster-5.7:jp-review-fixes into ~ubuntu-server-dev/ubuntu/+source/percona-xtradb-cluster-5.7:master

[Corey Bryant]

I'm not sure how to handle boost copyrights, there are over 50K hits for 'copyright' with case ignored.
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https://code.launchpad.net/~ubuntu-server-dev/ubuntu/+source/percona-xtradb-cluster-5.7/+git/percona-xtradb-cluster-5.7/+merge/337000
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