Fixes #1220 Added setting do disable timeout stacking

src/common/Channel.cpp

@@ -144,7 +144,7 @@ void Channel::addOrReplaceTimeout(MessagePtr message)
             if (!message->flags.has(MessageFlag::PubSub) &&
                 s->flags.has(MessageFlag::PubSub))  //
             {
-                addMessage = false;
+                addMessage = timeoutStackStyle == TimeoutStackStyle::DontStack;
                 break;
             }
 

src/common/Channel.hpp

@@ -21,8 +21,9 @@ using MessageFlags = FlagsEnum<MessageFlag>;
 enum class TimeoutStackStyle : int {
     StackHard = 0,
     DontStackBeyondUserMessage = 1,
+    DontStack = 2,
 
-    Default = StackHard,
+    Default = DontStackBeyondUserMessage,
 };
 
 class Channel : public std::enable_shared_from_this<Channel>