Merge pull request #16613 from liaozan

* pr/16613:
  Polish "Fix UndertowWebServer's logger name"
  Fix UndertowWebServer's logger name

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/UndertowWebServer.java

 /*
- * Copyright 2012-2018 the original author or authors.
+ * Copyright 2012-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -49,7 +49,7 @@ import org.springframework.util.StringUtils;
  */
 public class UndertowWebServer implements WebServer {
 
-	private static final Log logger = LogFactory.getLog(UndertowServletWebServer.class);
+	private static final Log logger = LogFactory.getLog(UndertowWebServer.class);
 
 	private final Object monitor = new Object();