Reactive Jetty web server does not fail fast when configured to use a server name bundle which Jetty does not support

[wilkinsona]

We don't support SNI with Jetty and an attempt to use a server name SSL bundle with a Jetty servlet web server fails fast:

spring-boot/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/jetty/JettyServletWebServerFactory.java

Lines 247 to 250 in e51efef

	private void customizeSsl(Server server, InetSocketAddress address) {
	Assert.state(getSsl().getServerNameBundles().isEmpty(), "Server name SSL bundles are not supported with Jetty");
	new SslServerCustomizer(getHttp2(), address, getSsl().getClientAuth(), getSslBundle()).customize(server);
	}

A similar assertion should be made on the reactive side:

spring-boot/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/jetty/JettyReactiveWebServerFactory.java

Lines 251 to 253 in e51efef

	private void customizeSsl(Server server, InetSocketAddress address) {
	new SslServerCustomizer(getHttp2(), address, getSsl().getClientAuth(), getSslBundle()).customize(server);
	}