body-drain: rename server stat new= to accepted_total= to avoid reading it as open conns

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GbnJj9ZqEx9nUvzkjdwfMq

99-experiments/body-drain/main.go

@@ -143,7 +143,9 @@ func serveForever(addr string) {
 			s.close()
 			return
 		case <-tick.C:
-			fmt.Printf("%s  new=%d active=%d goroutines=%d\n",
+			// accepted_total only ever grows (every conn ever accepted);
+			// active is what's open right now.
+			fmt.Printf("%s  accepted_total=%d active=%d goroutines=%d\n",
 				time.Now().Format("15:04:05"), s.newConns.Load(), s.activeConns.Load(), runtime.NumGoroutine())
 		}
 	}