README: add security blurb and copyright/license

README.md

@@ -89,5 +89,19 @@ New additions will be met with skepticism. If you think there is a
 missing feature, please file a bug clearly describing the problem and 
 the alternatives you tried before submitting a PR.
 
-If you find a security issue, please report it through security@docker.com,
-where we can take measures to responsibly manage the issue.
+# Reporting security issues
+
+The maintainers take security seriously. If you discover a security 
+issue, please bring it to their attention right away!
+
+Please DO NOT file a public issue, instead send your report privately
+to security@docker.com.
+
+Security reports are greatly appreciated and we will publicly thank you 
+for it. We also like to send gifts—if you're into Docker schwag, make 
+sure to let us know. We currently do not offer a paid security bounty 
+program, but are not ruling it out in the future.
+
+# Copyright and license
+
+Copyright © 2016 Docker, Inc. All rights reserved, except as follows. Code is released under the Apache 2.0 license. The README.md file, and files in the "docs" folder are licensed under the Creative Commons Attribution 4.0 International License under the terms and conditions set forth in the file "LICENSE.docs". You may obtain a duplicate copy of the same license, titled CC-BY-SA-4.0, at http://creativecommons.org/licenses/by/4.0/.