/** \brief DHCP Proxy config add / del request
@param client_index - opaque cookie to identify the sender
@param context - sender context, to match reply w/ request
/** \brief DHCP Proxy config add / del request
@param client_index - opaque cookie to identify the sender
@param context - sender context, to match reply w/ request
via dhcp_compl_event API message if non-zero
@param set_broadcast_flag - in the DHCP Discover to control
how the resulting OFFER is addressed.
via dhcp_compl_event API message if non-zero
@param set_broadcast_flag - in the DHCP Discover to control
how the resulting OFFER is addressed.