'Add a new raw value for the given header.
@type name: L{bytes} or L{unicode}
@param name: The name of the header for which to set the value.
@type value: L{bytes} or L{unicode}
@param value: The value to set for the named header.'

def addRawHeader(self, name, value):

    values = self.getRawHeaders(name)
    if (values is not None):
        values.append(value)
    else:
        values = [value]
    self.setRawHeaders(name, values)
