small fixes related to README and tests

Signed-off-by: Erik Hollensbe <git@hollensbe.org>

README.md

@@ -108,6 +108,10 @@ zeronsd unsupervise 36579ad8f6a82ad3
 systemctl daemon-reload
 ```
 
+### Logging
+
+Set `ZERONSD_LOG` or `RUST_LOG` to various log levels or other parameters according to the [env_logger](https://crates.io/crates/env_logger) specification for more.
+
 ### Docker
 
 Running in docker is a little more complicated. You must be able to have a network interface you can import (joined a network) and must be able to reach `localhost:9999` on the host. At this time, for brevity's sake we are recommending running with `--net=host` until we have more time to investigate a potentially more secure solution.

tests/service.rs

@@ -302,9 +302,12 @@ impl TestNetwork {
             tokio::runtime::Handle::current().block_on(async {
                 self.leave().await.unwrap();
                 let central = self.central();
-                zerotier_central_api::apis::network_api::delete_network(&central, &self.identity())
-                    .await
-                    .unwrap_err();
+                zerotier_central_api::apis::network_api::delete_network(
+                    &central,
+                    &self.network.id.clone().unwrap(),
+                )
+                .await
+                .unwrap();
             })
         })
     }