Release Notes heads-up

[Paul W. Frields]

Jesse, et al. --

Be on the lookout for slight changes in the release notes package.
Content has changed somewhat while we try to maneuver our tools closer
to using the publican tool.  We will probably not make that target for
F10, but the changes we have made are subtle:

* Names of documents may have changed from
  e.g. RELEASE-NOTES-en_US.html => Release_Notes-en-US.html.

* To be safe, you may want to have any tools that copy content for use
  on our released spins check for both "en-US" and "en_US" in the
  appropriate places.