[Users] Handeling Diversion - expired?

[Helge Waastad]

Hi,
I have a question more in a general aspect.
Since the draft-levy-sip-diversion-08 has expired, should a Proxy strip
such headers?
According to RFC3261,the UAS MUST ignore headers-fields not defined in
the specification or any supported extension...

I've realized that some systems need Diversion headers for voicemail (I
know Asterisk doesn't, but Cisco Unity does)

Any comments?

-- 
Helge Waastad
Senior Engineer
Systemavdelingen
Smartnet