Merge branch '2.5.x' into 2.6.x

Closes spring-projectsgh-30046

Author: wilkinsona

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-jetty-jsp/src/test/java/smoketest/jetty/jsp/SampleWebJspApplicationTests.java

@@ -16,7 +16,6 @@
 
 package smoketest.jetty.jsp;
 
-import org.eclipse.jetty.server.AllowedResourceAliasChecker;
 import org.eclipse.jetty.server.handler.ContextHandler;
 import org.junit.jupiter.api.Test;
 
@@ -60,7 +59,7 @@ static class JettyCustomizerConfig {
 JettyServerCustomizer jettyServerCustomizer() {
 return (server) -> {
 ContextHandler handler = (ContextHandler) server.getHandler();
-handler.addAliasCheck(new AllowedResourceAliasChecker(handler));
+handler.addAliasCheck((path, resource) -> true);
 };
 }