[Users] totag_avpid

[Klaus Darilion]

Hi!

I just found this parameter in sl and presence module, but the usage is
not described well. What is it's purpose? I guess that the presence module
exports the totag into this AVP and the sl module use this totag in its
response.

I think it is not a good idea to have it configureable in 2 modules. We
had the same problem with the "use_domain" parameter in several modules
which was fixed recently. Maybe this can be fixed the same way - having it
configurable in sl module, and presence module look ups the value on
loading (or generate a error if not defined).

Further, the presence module's parameter documentation lack the default
values.

regards
klaus