[Serusers] more about record route

[Juha Heinanen]

Maxim Sobolev writes:
 > 
 > Well, IMO absence or presence of tag in the To header field should be 
 > the definite difference between the two. INVITE which creates a dialg 
 > would be To-tag-less, while one that refreshes a dialog would usually 
 > have one. And if my memory serves according to the RFC INVITE is the 
 > only type of message which can create a dialog.

also subscribe and even notify can create a dialog.

-- juha