plugin/file: fix zone expiration (#1933)

plugin/file/secondary.go

@@ -147,13 +147,14 @@ Restart:
 					// transfer failed, leave retryActive true
 					break
 				}
+			}
+
+			// no errors, stop timers and restart
 			retryActive = false
-				// transfer OK, possible new SOA, stop timers and redo
 			refreshTicker.Stop()
 			retryTicker.Stop()
 			expireTicker.Stop()
 			goto Restart
-			}
 
 		case <-refreshTicker.C:
 
@@ -172,13 +173,15 @@ Restart:
 					retryActive = true
 					break
 				}
+			}
+
+			// no errors, stop timers and restart
 			retryActive = false
-				// transfer OK, possible new SOA, stop timers and redo
 			refreshTicker.Stop()
 			retryTicker.Stop()
 			expireTicker.Stop()
 			goto Restart
-			}
+
 		}
 	}
 }