fix config_mip6 table to understand "homepref" config parameter and issue SIOCAHOMEPREF_MIP6 ioctl.
fix config_mip6 table to understand "homepref" config parameter and
issue SIOCAHOMEPREF_MIP6 ioctl.

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame