Issue #5019 - add jetty module files and xml to use ssl-reload with start.jar

Signed-off-by: Lachlan Roberts <lachlan@webtide.com>

jetty-ssl-reload/src/main/config/etc/jetty-ssl-reload.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0"?><!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_3.dtd">
+
+<Configure id="Server" class="org.eclipse.jetty.server.Server">
+
+  <Call name="addBean">
+    <Arg>
+      <New id="sslKeyStoreScanner" class="org.eclipse.jetty.ssl.reload.SslKeyStoreScanner.SslKeyStoreScanner">
+        <Arg><Ref refid="sslContextFactory"/></Arg>
+        <Set name="scanInterval"><Property name="jetty.ssl.reload.scanInterval" default="1"/></Set>
+      </New>
+    </Arg>
+  </Call>
+</Configure>

jetty-ssl-reload/src/main/config/modules/ssl-reload.mod

@@ -0,0 +1,17 @@
+DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+
+[description]
+Enables the SSL keystore to be reloaded after any changes are detected on the file system.
+
+[depend]
+ssl
+
+[lib]
+lib/jetty-ssl-reload-${jetty.version}.jar
+
+[xml]
+etc/jetty-ssl-reload.xml
+
+[ini-template]
+# Monitored directory scan period (seconds)
+# jetty.ssl.reload.scanInterval=1