Modify network interface buffers (currently linux only)

    CLI Example:

    .. code-block:: bash

        salt '*' network.mod_bufsize tx=<val> rx=<val> rx-mini=<val> rx-jumbo=<val>

def mod_bufsize(iface, *args, **kwargs):
    '''
    Modify network interface buffers (currently linux only)

    CLI Example:

    .. code-block:: bash

        salt '*' network.mod_bufsize tx=<val> rx=<val> rx-mini=<val> rx-jumbo=<val>
    '''
    if __grains__['kernel'] == 'Linux':
        if os.path.exists('/sbin/ethtool'):
            return _mod_bufsize_linux(iface, *args, **kwargs)

    return False