def load(path)
      ptr = CZMQ::FFI::Zconfig.load(path.to_s)
      return from_ffi_delegate(ptr) unless ptr.null?
      CZTop::HasFFIDelegate.raise_zmq_err(
        "error while reading the file %p" % path.to_s)
    end
def load(path)
      ptr = CZMQ::FFI::Zconfig.load(path.to_s)
      return from_ffi_delegate(ptr) unless ptr.null?
      CZTop::HasFFIDelegate.raise_zmq_err(
        "error while reading the file %p" % path.to_s)
    end
Loads a {Config} tree from a file.
 @param path [String, Pathname, #to_s] the path to the ZPL config file
 @raise [SystemCallError] if this fails
 @return [Config]