Upgrade to Jetty 9.4.21.v20190926

jetty-9.4.10.v20180503 - 03 May 2018
 + 110 Jetty JAASLoginService should not use getContextClassLoader to load role
   class name under OSGi
 + 1027 MultiPartInputStreamParser is slow for largish files
 + 1555 AuthenticationProtocolHandler unable to parse Digest WWW Header
 + 2018 No HttpClient API for receiving Server Sent Events
 + 2145 Enabled h2, http/1.1 + https failed with invalid preface
 + 2152 Produce jetty-home-source artifacts for Eclipse Jetty source jars
 + 2164 Ensure all jetty modules that use ServiceLoader have correct OSGi
   manifest headers
 + 2205 100% CPU usage in Selector using Jetty on Windows
 + 2311 TimeoutException when server sends unexpected content
 + 2337 ServletUpgradeRequest getSubProtocols() creates an ArrayList even if
   sub protocols is absent in WebSocket Upgrade Request.
 + 2349 Review HTTP/2 max streams enforcement
 + 2350 Support multiplexing in RoundRobinConnectionPool
 + 2361 CachingWebAppClassLoader is not using cache properly
 + 2366 Review HTTP/2 interleaving
 + 2376 Relax ContextHandler and ServletContextHandler requirements in
   WebSocket to allow SpringBoot's MockMVC to function
 + 2387 NPE in URIUtil.equalsIgnoreEncodings when working with jar:file:// URIs
 + 2388 AtomicBiInteger.compareAndSet(long,int,int) not using encoded parameter
 + 2391 Allow for optional "\u####" escaping in
   org.eclipse.jetty.util.ajax.JSON.toString()
 + 2398 MultiPartFormInputStream parsing should default to UTF-8, but allowed
   to be overridden by Request.setCharacterEncoding()
 + 2403 allow --add-to-start to  specify maven repository location
 + 2409 Ensure no duplicate config classes are assigned to WebApps in OSGi
   environments
 + 2413 Server log timestamp is inconsistent
 + 2420 Simplify HttpTransportOverHTTP2
 + 2425 Review BufferUtil.isMappedBuffer()
 + 2427 SessionInactivityTimeout does not stop upon expiration
 + 2430 CDI version mismatch with jetty-maven-plugin:run-forked and Weld
 + 2435 Class.newInstance() is deprecated in Java 9+
 + 2445 Add HttpServletRequest support to DefaultCallbackHandler
 + 2446 AttributeNormalizer does not support "user.home" to be "/"
 + 2451 ReservedThreadExecutor.getAvailable() is not atomic and can return
   incorrect value
 + 2454 Avoid sending empty DATA frame in case of HTTP/2 trailers
 + 2464 NPE when constructing subclasses of ExecutorThreadPool
 + 2468 EWYK concurrent produce can fail SSL connections
 + 2472 Default Maven Central Repository URL used to download artifacts in
   start.jar should use https
 + 2474 HTTP/2 client not handling invalid servers correctly
 + 2478 ThreadPoolExecutor does nto reap Idle threads
 + 2482 Possible NPE in MemcachedSessionDataMapFactory
 + 2491 WebSocket FragmentExtension can produce an invalid stream of frames
 + 2495 FileSessionDataStore: private save method
 + 2496 Jetty Maven Plugin should skip execution on projects it cannot support
 + 2498 Add QueuedThreadPool.removeThread(Thread) for extendability reasons

jetty-9.4.9.v20180320 - 20 March 2018
 + 347 Avoid sending request using a connection that is idle timing out
 + 1416 GzipHandler generated ETag suffix has problems with If-Match header
   logic
 + 1602 WebAppContext is started twice, once by deployer, again by lifecycle
 + 1614 AbstractNCSARequestLog does not extract the user from the http header
   when it has not been authenticated
 + 1770 SniX509ExtendedKeyManager.chooseServerAlias() throws
   NullPointerException when socket is null
 + 1797 JEP 238 - Multi-Release JAR files break bytecode scanning
 + 1832 Bad HTTP Close prevents proper TCP close
 + 1918 Scalable scheduler implementation
 + 1933 Use CLASSPATH for scanning java9 system classes
 + 1940 Embedded CDI: SessionScoped gives a NPE
 + 1949 Client-side problems with digest authentication
 + 1956 Store and report build information of Jetty
 + 1966 HttpMethod case sensitive
 + 1970 ManagedSelector can lose selector thread under high concurrent load
 + 1973 Implement minimum response data rate
 + 1983 Improve warning for incompatible ALPN processor
 + 1986 ServletContextHandler.Context addListener() methods support session
   listeners
 + 2003 Do not submit blocking tasks as managed selector actions
 + 2006 ServletInputStream.isReady not registering interest when it should
 + 2010 SniX509ExtendedKeyManager causes exception: "FIPS mode: only SunJSSE
   KeyManagers may be used"
 + 2014 Support unix domain sockets in HttpClient
 + 2015 jetty-alpn-conscrypt-server needs appropriate osgi headers in manifest
 + 2016 jetty-alpn-openjdk8-server needs correct osgi headers in manifest
 + 2019 Expose HttpClientTransport in JMX
 + 2020 Introduce a name for `HttpClient` instances
 + 2022 Fine grained RFC HTTP Compliance modes: including OWS prior to field
   colon
 + 2028 Add osgi headers for alpn-java client and server
 + 2030 NPE in AnnotationConfiguration with DEBUG enabled
 + 2033 Improve HTTP/2 session and stream stall times report
 + 2034 Improve HTTP2Session dump
 + 2035 FlowControlStrategy keeps around reset streams
 + 2037 HTTP/2 stream reset leaves stream frames in the flusher
 + 2038 FileSessionDataStore.deleteAllFiles(File, String) can become slow
 + 2043 ConcurrentModificationException during annotation parsing
 + 2046 Server.stop not closing connections
 + 2050 Clarify ObjectMBean getObject[Name|Context]Basis() methods
 + 2079 Upgrade to apache jasper 8.5.24
 + 2080 Exclude more maven machinery dependencies from the jetty-maven-plugin
   server path
 + 2081 No idle timeout exception when dispatch is delayed
 + 2088 Recycle HTTP/2 channels on the client
 + 2090 Jetty fails to start on OpenJDK 9: "Invalid Java version 9.0.1.3"
 + 2093 Correcting Bom managed dependencies that do not exist
 + 2114 Fix NPE in JettyHttpServerProvider
 + 2117 Allow to configure HttpClient default request Content-Type
 + 2130 Introduce thread pool module for simpler configuration of thread pool
   in standalone
 + 2131 Introduce a monitored thread pool
 + 2136 maven & jetty-maven-plugin & offline
   error:java.net.UnknownHostException: www.eclipse.org
 + 2148 Limit BufferUtil.toDetailString() raw character display to USASCII
   7-bit printable characters
 + 2152 Produce jetty-home-source artifacts for Eclipse Jetty source jars
 + 2160 Digest authentication should use absolute path
 + 2164 Ensure all jetty modules that use ServiceLoader have correct OSGi
   manifest headers
 + 2190 HTTP/2 close and GOAWAY behavior
 + 2203 Use GlobalWebAppConfigBinding rather than special methods on
   DeploymentManager/WebAppProvider
 + 2209 jetty-maven-plugin deploy-war silently fails (unless the pom has war
   packaging)
 + 2210 NPE at org.eclipse.jetty.client.HttpDestination.newExchangeQueue
 + 2218 Adding workaround for Windows NIO Selector Bug
 + 2232 Dependency Conflict: Conflicting JARs org.apache.maven:maven-project
 + 2255 Notify SSL handshake failures on write failures
 + 2275 jetty.server.ResourceService.doGet() + RequestDispatcher INCLUDE
 + 2278 Could not find artifact
   org.eclipse.jetty.tests:test-webapps-parent:pom:9.4.8.v20171121
 + 2279 Jetty 9.4.x start.jar:  "?=" in [ini] defeats Issue #1139 functionality
 + 2280 Default application/json to utf-8 encoding in encoding.properties
 + 2284 NPE from start.jar during JVM version parsing
 + 2288 Cleanup the statistics classes
 + 2291 Expose HTTP/2 close reason in dumps
 + 2293 HTTP/2 client multiplexed connection pool creates too many connections
 + 2297 HTTP/2 client transport should honor HttpClient.connectBlocking
 + 2298 Override the processor number with an environment variable
 + 2307 Error page can have null charset in content type
 + 2308 Type change in MonitorTask - int cannot be converted to
   ThreadPoolExecutor
 + 2312 HTTP/2 Connection.Listener notified after first request
 + 2313 Dump HTTP/2 channel state
 + 2318 HttpParser.Listener.onBadMessage() should take BadMessageException
 + 2346 Missing stack traces in HTTPChannel.onException
 + 2358 Add ALPN module file for JDK 10