[Users] Adding new header fields to Status message (Registrar/200 OK)?

[Joachim Fabini]

Hi,

Again, complete newbie question (honestly, I searched 
the OpenSER and SER archives and did not find an answer ;):

(How) can OpenSER add a new header field into the 
registrar's 200 OK status message in reply to a 
successful REGISTER? (New header field meaning that
the header line was not present in the REGISTER).

What I tried so far is to add the field in two ways: 

- Added the field to the incoming REGISTER message
  while doing the main processing using append_hf().
  The new header field is not included into the 
  200 OK.
- Added the field within the OnReply_Route[1] block
  (triggered). But apparently OpenSER does invoke
  the OnReply_Route only for incoming status messages.
  When the code is invoked by a proxy on traversing
  status messages it works perfectly, for the 
  registrar it does not.

Any idea how to modify Registrar-outgoing status 
messages?

Many thanks in advance,
--Joachim