Make NEWS match the 1.6.2 Release Notes

Change-Id: Ic98bbb37e2f81e36724e69af348c06a2c6b8b5c3
Reviewed-on: http://gerrit.openafs.org/9601
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Ken Dreyer <ktdreyer@ktdreyer.com>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>