ospf6d: We should accept long form of "no redistribute"

When turning off redistribution in ospf6, allow the
user to specify the full form of the command entered.

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
diff --git a/ospf6d/ospf6_asbr.c b/ospf6d/ospf6_asbr.c
index 265a178..870ab18 100644
--- a/ospf6d/ospf6_asbr.c
+++ b/ospf6d/ospf6_asbr.c
@@ -680,6 +680,15 @@
   return CMD_SUCCESS;
 }
 
+ALIAS (no_ospf6_redistribute,
+       no_ospf6_redistribute_route_map_cmd,
+       "no redistribute " QUAGGA_REDIST_STR_OSPF6D " route-map WORD",
+       NO_STR
+       "Redistribute\n"
+       QUAGGA_REDIST_HELP_STR_OSPF6D
+       "Route map reference\n"
+       "Route map name\n")
+
 int
 ospf6_redistribute_config_write (struct vty *vty)
 {
@@ -1323,6 +1332,7 @@
   install_element (OSPF6_NODE, &ospf6_redistribute_cmd);
   install_element (OSPF6_NODE, &ospf6_redistribute_routemap_cmd);
   install_element (OSPF6_NODE, &no_ospf6_redistribute_cmd);
+  install_element (OSPF6_NODE, &no_ospf6_redistribute_route_map_cmd);
 }
 
 void