[Users] Recursive routes and retcode

[Andreas Granig]

Hi Klaus,

> What is your goal? Do you want to strip the extension till you get the
> "kopfnummer" (sorry, I do not know the english term)?

Maybe "base number" or something like that? Yes, that's exactly what I'm 
trying to find out. We've used a self-made lookup function until now, 
but in the course of the switch from SER to OpenSER I try to eliminate 
as much self-written stuff as possible for easier maintenance. I'm aware 
of the performance impact, but I'm currently just playing around with 
some stuff to see what's possible and maybe usable...

> I know other which solve this problem by using a private ENUM tree with
> wildcard NAPTRs for the extensions which point to the "main URI".

We use a related approach in the e164.info tree. I'm quite curious about 
the performance of the different possibilities, so I find it rather 
interesting to compare these things in a test-bed...

Andy