Fixed misc FIXMEs

akka-actor/src/main/scala/akka/actor/Actor.scala

@@ -119,8 +119,9 @@ case class UnhandledMessageException(msg: Any, ref: ActorRef = null) extends Exc
 
 /**
  * Classes for passing status back to the sender.
+ * Used for internal ACKing protocol. But exposed as utility class for user-specific ACKing protocols as well.
  */
-object Status { //FIXME Why does this exist at all?
+object Status {
   sealed trait Status extends Serializable
   case class Success(status: AnyRef) extends Status
   case class Failure(cause: Throwable) extends Status

akka-actor/src/main/scala/akka/routing/ConnectionManager.scala

@@ -14,7 +14,6 @@ import java.net.InetSocketAddress
 /**
  * An Iterable that also contains a version.
  */
-// FIXME REMOVE VersionedIterable
 trait VersionedIterable[A] {
   val version: Long
 

akka-actor/src/main/scala/akka/routing/RoutedProps.scala

@@ -59,8 +59,6 @@ object RouterType {
 
   /**
    * A RouterType that select the connection based on the least amount of ram used.
-   *
-   * FIXME: this is extremely vague currently since there are so many ways to define least amount of ram.
    */
   object LeastRAM extends RouterType
 

akka-actor/src/main/scala/akka/routing/Routing.scala

@@ -142,8 +142,6 @@ private[akka] class RoutedActorRef(val routedProps: RoutedProps, override val ad
 /**
  * An Abstract Router implementation that already provides the basic infrastructure so that a concrete
  * Router only needs to implement the next method.
- *
- * FIXME: this is also the location where message buffering should be done in case of failure.
  */
 trait BasicRouter extends Router {
 
@@ -258,15 +256,17 @@ class DirectRouter extends BasicRouter {
  * @author <a href="http://jonasboner.com">Jonas Bon&#233;r</a>
  */
 class RandomRouter extends BasicRouter {
+  import java.security.SecureRandom
 
   private val state = new AtomicReference[RandomRouterState]
 
-  //FIXME: threadlocal random?
-  private val random = new java.util.Random(System.nanoTime)
+  private val random = new ThreadLocal[SecureRandom] {
+    override def initialValue = SecureRandom.getInstance("SHA1PRNG")
+  }
 
   def next: Option[ActorRef] = currentState.array match {
     case a if a.isEmpty ⇒ None
-    case a              ⇒ Some(a(random.nextInt(a.length)))
+    case a              ⇒ Some(a(random.get.nextInt(a.length)))
   }
 
   @tailrec