I would like to discuss more about the removal of use_domain parameter. It is a common parameter name across many modules and it is a easy way to turn on/off multi-domain support (even done also for alias_db in default kamailio.cfg).

I would like a coherent solution, like either removing this mod param everywhere or still keep it and also allow the per-function option to enable/disable.

Moreover, changing the default in using the domain is going to break compatibility may result in unexpected behaviour without prior visible notice, as people can reuse an old config without use_domain parameter set, so no error is triggered, but behaviour is changed. So I think the default should be without domain (this is the default across kamailio modules) and a flag to enable domain based lookup.

Keeping the use_domain won't change much the patch, the flags need to be initialized based on it:

``` if(use_domain) { flags |= **domain_lookup_flag** } ```

Travis reports that the inter-module API was broken -- app_lua doesn't compile as the function prototype for alias db lookup was changed. This is an easy fix, I can take care of.

@khoegh pushed 2 commits.

456941e alias_db: Re-add module parameter use_domain c1e36d0 alias_db: Add flag to use domain to alias_db_lookup/alias_db_find

Closed #823.

I did some testing and it seems to work as expected. Thanks.