Moving to R-T-C mode for 4.0.0 release - No commits without review

[Sidney Markowitz]

It's time for a code freeze in preparation for the release of 4.0.0 
release candidates.

Please do not commit anything to trunk other than the usual ongoing 
rules stuff that finds its way into the rule update process.

Any new bug fixes that need to be committed for 4.0.0 should be 
associated with a bug opened with a 4.0 milestone and get reviewed 
before committed.

Please hold off on committing for any issue that is not marked as 4.0 
milestone.

Thanks,

 Sidney