List the paper's name, not just a link (the link was broken).
update
The Intel link no longer works, update with the name of the paper.
We distribute under GNU GPL versions 2 or 3, update the wt copyright notice.
Fix an LSM bug in merge, when checking generation span.

We were looking in the wrong chunk for the comparison when
HAVE_DIAGNOSTIC wasn't defined.

Refs JIRA-16123
Merge branch 'develop' into checkpoint-concurrentcy