Description of configuration options for ec2

Configuration option = Default value	Description
[ec2]
driver = keystone.contrib.ec2.backends.kvs.Ec2	(StrOpt) EC2Credential backend driver.
[keystone_ec2_token]
cafile = None	(StrOpt) A PEM encoded certificate authority to use when verifying HTTPS connections. Defaults to the system CAs.
certfile = None	(StrOpt) Client certificate key filename. Required if EC2 server requires client certificate.
insecure = False	(BoolOpt) Disable SSL certificate verification.
keyfile = None	(StrOpt) Required if EC2 server requires client certificate.
url = http://localhost:5000/v2.0/ec2tokens	(StrOpt) URL to get token from ec2 request.