apache/libcloud — pull request #356 by sfriesel (2014-09-09 17:06:17+00:00)
Title: [LIBCLOUD-612] Customize HTTP vendor prefix for Google Storage

https://issues.apache.org/jira/browse/LIBCLOUD-612

Google storage uses/expects custom headers like meta data
and storage class to be prefixed with "x-goog" instead of
"x-amz". This enables use of object tagging in the Google
Storage provider.