Configuration options are defined on a per-device basis. The following options are
Zend_Http_UserAgent_AbstractDevice. Like all options,
the "." character represents an additional level of depth to the configuration array.
The name of a Features adapter class that has either been previously loaded or which is discoverable via autoloading, or used in conjunction with the
features.pathoption. This class must implement the
If provided, the filesystem path to the features adapter class being used. The path must either be an absolute path or discoverable via the