+slf,act #21671 allow using Markers with LoggingAdapter (#21707)

* +slf,act #21671 allow using Markers with LoggingAdapter

* +slf,act #21671 allow using Markers with LoggingAdapter

* improve compatibility

* add docs

* address review comments

* actually print the marker

akka-ssl-config/src/main/scala/com/lightbend/sslconfig/akka/SSLEngineConfigurator.scala

@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2016 Lightbend Inc. <http://www.lightbend.com>
+ */
+
+package com.lightbend.sslconfig.akka
+
+import javax.net.ssl.{ SSLContext, SSLEngine }
+
+/**
+ * Gives the chance to configure the SSLContext before it is going to be used.
+ * The passed in context will be already set in client mode and provided with hostInfo during initialization.
+ */
+trait SSLEngineConfigurator {
+  def configure(engine: SSLEngine, sslContext: SSLContext): SSLEngine
+}

akka-ssl-config/src/main/scala/com/lightbend/sslconfig/akka/util/AkkaLoggerFactory.scala

@@ -0,0 +1,12 @@
+/*
+ * Copyright (C) 2016 Lightbend Inc. <http://www.lightbend.com>
+ */
+
+package com.lightbend.sslconfig.akka.util
+
+/** INTERNAL API */
+final class AkkaLoggerFactory(system: ActorSystem) extends LoggerFactory {
+  override def apply(clazz: Class[_]): NoDepsLogger = new AkkaLoggerBridge(system.eventStream, clazz)
+
+  override def apply(name: String): NoDepsLogger = new AkkaLoggerBridge(system.eventStream, name, classOf[DummyClassForStringSources])
+}