Add nohttp to build

See gh-22839

build.gradle

@@ -4,6 +4,7 @@ buildscript {
 	}
 	dependencies {
 		classpath("io.spring.gradle:propdeps-plugin:0.0.9.RELEASE")
+		classpath("io.spring.nohttp:nohttp-gradle:0.0.2.RELEASE")
 		classpath("org.asciidoctor:asciidoctorj-pdf:1.5.0-alpha.16")
 	}
 }
@@ -252,9 +253,21 @@ configure(rootProject) {
 	description = "Spring Framework"
 
 	apply plugin: "groovy"
+	apply plugin: "io.spring.nohttp"
 	apply from: "${gradleScriptDir}/jdiff.gradle"
 	apply from: "${gradleScriptDir}/docs.gradle"
 
+	nohttp {
+		source.exclude "**/test-output/**"
+		whitelistFile = project.file("src/nohttp/whitelist.lines")
+		def projectDirURI = project.projectDir.toURI()
+		allprojects.forEach { p ->
+			def outURI = p.file("out").toURI()
+			def pattern = projectDirURI.relativize(outURI).path + "**"
+			source.exclude pattern
+		}
+	}
+
 	dependencyManagement {
 		imports {
 			mavenBom "io.projectreactor:reactor-bom:${reactorVersion}"

src/nohttp/whitelist.lines

+^http://[^/]*caucho.com.*
+^http://[^/]*gebish.org.*
+^http://[^/]*groovy-lang.org.*
+^http://[^/]*hsqldb.org.*
+^http://[^/]*sourceforge.net.*
+^http://easymock.org.*
+^http://forum.thymeleaf.org.*
+^http://jotm.objectweb.org.*
+^http://json-b.net/.*
+^http://objenesis.org.*
+^http://reactivex.io.*
+^http://www.beanshell.org.*
+^http://www.doclet.com.*
+^http://www.jensgulden.de.*
+^http://www.mockobjects.com.*
+^http://www.w3.org/2000/xmlns/
+^http://xunitpatterns.com.*