Upgrade to Tomcat 8.5.40, Jetty 9.4.17, Netty 4.1.35

Author: jhoeller

build.gradle

@@ -41,20 +41,20 @@ ext {
 	groovyVersion        = "2.4.16"
 	hsqldbVersion        = "2.4.1"
 	jackson2Version      = "2.9.8"
-	jettyVersion         = "9.4.15.v20190215"
+	jettyVersion         = "9.4.17.v20190418"
 	junitJupiterVersion  = "5.0.3"
 	junitPlatformVersion = "1.0.3"
 	junitVintageVersion  = "4.12.3"
 	kotlinVersion        = "1.2.71"
 	log4jVersion         = "2.11.2"
-	nettyVersion         = "4.1.34.Final"
+	nettyVersion         = "4.1.35.Final"
 	reactorVersion       = "Bismuth-SR17"
 	rxjavaVersion        = "1.3.8"
 	rxjavaAdapterVersion = "1.2.1"
 	rxjava2Version       = "2.1.17"
 	slf4jVersion         = "1.7.26"	  // spring-jcl + consistent 3rd party deps
 	tiles3Version        = "3.0.8"
-	tomcatVersion        = "8.5.39"
+	tomcatVersion        = "8.5.40"
 	undertowVersion      = "1.4.27.Final"
 
 	gradleScriptDir = "${rootProject.projectDir}/gradle"