fog/fog — pull request #1386 by pastorius (2012-12-17 18:23:46+00:00)
Title: Bugfix for Storage::Rackspace::File#save with etag attribute

fixed bug where Fog::Storage::Rackspace::File raised Fog::Storage::Rackspace::NotFound if file was created with passed etag attribute. Changed to check existence based on `#last_modified` instead of `#etag`.

@geemus initially recommended that I use either one for pull request #1251. I opted for `#etag`, but this wasn't a good choice because the user may want to set that when creating a file to ensure that the entire file was received by the server. `#last_modified` should not be set by the user.