[Users] Serial forking and accounting

[Andreas Granig]

Daniel-Constantin Mierla wrote:
> But in case of 404 the record should be in missed calls table, so B can 
> see that someone tried to call it. The 200OK is recorded in acc table so 
> you can bill it.

We run a self-made mediation system, so we're logging everything into 
acc table. However, just for accounting I think it will be sufficient to 
build a small mapping route for the most common error codes to be used 
with acc_db_request().

But maybe we could extend the function to use the last reply code in the 
future?

Andy