[Serusers] append_rpid_hf() replacement in CVS-HEAD

[Hendrik Scholz]

Hi!

append_rpid_hf() was removed from CVS in 2005 with the following note:
"Rpid support dropped, it will be implemented using AVPs."

Is there a standard way of implementing this?
OpenSER utilizes avp_printf() for this which isn't part of SER:
http://www.mail-archive.com/devel@openser.org/msg02248.html

What is the Best Current Practice to add the Rpid header?

If there is none I'd help implementing something new since I'm already
tackling some Rpid to P-Asserted-Identity transformation things.
It would also be handy to add the privacy tag according to another
AVP (although I'm not using it).

Cheers,
  Hendrik

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