[Serusers] Accept invite only for registered users

[Andreas Granig]

Hi,

> if (method=="INVITE") {
>   if (!lookup(location)) {
> 
>       sl_send_reply(404,"Not authorized");
>       break;
> 
>   }
> }

This one checks if the *called* party is registered at SER, not the 
*calling* party.

However, I don't see a sense in restricting outgoing calls only to 
registered users. You can authenticate the caller using 
proxy_authorize() anyway. If the user doesn't register, he just cannot 
be called.

Andy