[Serusers] How to execute failure_route block by the same child process.

[Juha Heinanen]

Bogdan-Andrei Iancu writes:

 > you can either use avpops to populate the fork_list (use avp_write or 
 > avp_load to read from db), either there is a function (not sure about 
 > the name) in lcr module (also to read from db).

lcr module's sequential forking is based on contacts having different q
values.  ser.cfg first needs to call load_contacts() that loads all
contacts to avps and after that ser.cfg needs to call next_contacts() as
many times as there are contacts left or the requests succeeds.

-- juha