HeartBeat.MarkConnection(this) called twice per Send(..) in ForeverTransport

[KrzysFR]

The method Send(PersitentResponse) in base class ForeverTransport calls HeartBeat.MarkConnection(this) then calls OnSending(data) that will also call MarkConnection(this). It will be called twice per send.

All classes deriving from ForeverTransport (ForeverFrameTransport, and ServerSentEventsTransport) overide Send and do their own thing, so that would only happen for custom transport classes.

[davidfowl]

Fixed