Support route deletion entries in SVP_R_LOG_ACK.

*** 53,58 ****
--- 53,59 ----
          libvarpd_prop_set_type          { FLAGS = EXTERN };
          libvarpd_prop_set_default       { FLAGS = EXTERN };
          libvarpd_prop_set_nodefault     { FLAGS = EXTERN };
          libvarpd_prop_set_range_uint32  { FLAGS = EXTERN };
          libvarpd_prop_set_rangestr      { FLAGS = EXTERN };
+         libvarpd_route_flush            { FLAGS = EXTERN };
  };