1.9.4rc1 - send me cherry-picks and merge requests

[Jeremy Huddleston]

Right now, the changes on the server-1.9-branch are pretty small (which is hopefully an indicator of a high level of stability).  The schedule calls for the 1.9.4rc1 to be tagged on Friday, so please send me any change requests before then, so I can cherry-pick and merge as appropriate.  After rc1, we'll have two weeks before rc2, then one more week before 1.9.4

Thanks,
Jeremy