[Serusers] rewritehostport and RFC3261 compliant

[inge]

Hi all,

I find an issue with a problem encountered on some products.

The problem only concerns on-net calls. In fact, when a SER User A calls
a SER User B :

	- if B doesn't answer, after the tm timer : 

		==> t_on_failure("1") 
		==> setflagt(24) 
		==> load $ruri/username in vm_uri/usr_vm if flag is set to 24
		then ==> avp_pushto $ruri s:vm_uri 
		==> resetflag(24) 
		==> add prefix Prefix("710")
		==> rewritehostport(Asterisk:4060) 
		==> append_branch
		==> t_relay_to_udp(Asterisk,4060)

This is the process apply for transfer the call to the voicemail
Asterisk.

But, and only in this on-net case, the To-Tag change during this
process, cause the failure of communication for some products.

Whereas the RFC 3261 specify "... This tag will be incorporated by both
endpoints into the dialog and will be included in all future requests
and responses in this call ...".

Thanks for your support.