on R5 it seems a reply to a asynchronously-forwarded synchronous BMessage is the same as when no forward happens
I didn't test on Haiku, but I suspect the behavior is different, especially a _previous_ is added as for asynchronous BMessages
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17814 a95241bf-73f2-0310-859d-f6bbb57e9c96