Support route deletion entries in SVP_R_LOG_ACK.

*** 63,72 ****
--- 63,74 ----
          libvarpd_fma_restore;
  
          libvarpd_inject_varp;
          libvarpd_inject_arp;
  
+         libvarpd_route_flush;
+ 
          libvarpd_instance_activate;
          libvarpd_instance_create;
          libvarpd_instance_destroy;
          libvarpd_instance_lookup;
          libvarpd_instance_id;