Show warning if 127.0.0.1 is IP banned

TODO.md

@@ -4,6 +4,7 @@
 - Resolve TODOs in code
 - Don't drop errors, handle everywhere where needed (some were dropped while
   prototyping to speed up development)
+- Spigot/paper plugin to get real player IP from lazymc, reimplement ban-ip
 
 ## Nice to have
 

src/service/ban_reload.rs

@@ -46,6 +46,12 @@ pub fn service(config: Arc<Config>, server: Arc<Server>) {
         }
     }
 
+    // Show warning if 127.0.0.1 is banned
+    if server.is_banned_ip_blocking(&("127.0.0.1".parse().unwrap())) {
+        warn!(target: "lazymc", "Local address 127.0.0.1 IP banned, probably not what you want");
+        warn!(target: "lazymc", "Use '/pardon-ip 127.0.0.1' on the server to unban");
+    }
+
     // Keep watching
     while watch(&server, &path) {}
 }