ZF-12327: Zend_Service_Rackspace_Files: add validation to container/object names


The attached patch adds checks that the container and object name passed to Zend_Service_Rackspace_Files meet the requirements outlined at:…

It supersedes the patch I submitted for ZF-12309. It should really convert to UTF-8 as well, but I haven't quite figured out how you guys handle that.


Added validation to container and cdn functions