Any reply code/status translation is going to invoke the absorption of the old
reply and the generation of a new one, within the proxy. Proprietary SIP
headers would not be conserved in such a scenario.
To add headers to a reply, you can use append_to_reply(), which works in much
the same manner as append_hf().
Principal, Evariste Systems LLC (www.evaristesys.com)
Sent from my Google Nexus.
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