Polish 18453c0e

Document new configuration properties and remove redundant code

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java

@@ -114,10 +114,6 @@ public class ServerProperties implements EmbeddedServletContainerCustomizer, Ord
 		return this.undertow;
 	}
 
-	public JspServlet jspServlet() {
-		return this.jspServlet;
-	}
-
 	public String getContextPath() {
 		return this.contextPath;
 	}
@@ -455,13 +451,6 @@ public class ServerProperties implements EmbeddedServletContainerCustomizer, Ord
 				}
 			});
 
-			factory.addContextCustomizers(new TomcatContextCustomizer() {
-				@Override
-				public void customize(Context context) {
-					context.setBackgroundProcessorDelay(Tomcat.this.backgroundProcessorDelay);
-				}
-			});
-
 			String remoteIpHeader = getRemoteIpHeader();
 			String protocolHeader = getProtocolHeader();
 			if (StringUtils.hasText(remoteIpHeader)

spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc

@@ -57,6 +57,9 @@ content into your application; rather pick only the properties that you need.
 	server.session-timeout= # session timeout in seconds
 	server.context-parameters.*= # Servlet context init parameters, e.g. server.context-parameters.a=alpha
 	server.context-path= # the context path, defaults to '/'
+	server.jsp-servlet.class-name=org.apache.jasper.servlet.JspServlet # The class name of the JSP servlet
+	server.jsp-servlet.init-parameters.*= # Init parameters used to configure the JSP servlet
+	server.jsp-servlet.registered=true # Whether or not the JSP servlet is registered
 	server.servlet-path= # the servlet path, defaults to '/'
 	server.ssl.enabled=true # if SSL support is enabled
 	server.ssl.client-auth= # want or need