K 10
svn:author
V 8
cperciva
K 8
svn:date
V 27
2018-08-26T04:32:52.709811Z
K 7
svn:log
V 240
MFC r336420,336433,336593,336621,336622,336624,337394,337401,338141

Teach the EC2 AMI upload code to:
* Mark EBS snapshots as public,
* Announce new AMIs to an SNS topic, and
* Place the SVN branch and revision into the AMI "description".

END