def set_raise_for_proxy(raise_for_proxy):
    """
        set_raise_for_proxy

        Set the raise_for_proxy flag. If the flag is True (default) a ValueError exception
        is raised if the specified proxy is not available.

        @param raise_for_proxy: raise_for_proxy flag
        @type: raise_for_proxy: boolean
        @return: None
        """
