server config BUGFIX don't configure deleted endpoint

An endpoint may fail to be created if is after a deleted endpoint
depending on the order in the list of endpoints.
This patch don't try to create deleted endpoints. Skip the endpoint
with the 'delete' yang operation.
This fixes this error message:
> Endpoint "<endpoint name>" was not found.
> Applying ietf-netconf-server configuration failed.

Author: jeremie6wind

src/server_config.c

@@ -4314,6 +4314,12 @@ nc_server_config_listen_all_endpoints(const struct lyd_node *node)
     if (n) {
         /* go over all the endpoints */
         LY_LIST_FOR(lyd_child(n), iter) {
+            struct lyd_meta *m;
+            if ((m = lyd_find_meta(iter->meta, NULL, "yang:operation"))) {
+                if (!strcmp(lyd_get_meta_value(m), "delete")) {
+                    continue;
+                }
+            }
             /* get the endpoint and bind structs from the node */
             NC_CHECK_RET(nc_server_config_get_endpt(iter, &endpt, &bind));