[SR-Users] rtpproxy module flags 1 and 2 question

[Juha Heinanen]

i'm new to rtpproxy (have been using mediaproxy for years) and now try
to understand if it would make sense to switch over.  rtpproxy readme
has this on flags value 1:

  + 1 - append first Via branch to Call-ID when sending command to
        rtpproxy.
        ...
	This is especially useful if you have serially forked call
        scenarios where rtpproxy gets an "update" command for a new
        branch, and then a "delete" command for the previous branch,
        which would otherwise delete the full call, breaking the
        subsequent "lookup" for the new branch.

how it would be possible in SERIAL forked scenario to get anything for a
new branch before previous branch has first failed and gone?

-- juha