[Serdev] Can the function is_to_local be added to the domain module

[Juha Heinanen]

Zeus Ng writes:

 > However, I think this is not a reliable checking method as R-URI can be
 > changed along the way from proxy to proxy. 

yes,  r-uri can be changed, but if you don't want your proxy to act as a
relay, only process requests where r-uri is for the domains the proxy is
responsible for.

 > As far as I understand, the "To" header should not be changed even after
 > passing a proxy. So, checking it for relay access is much better than
 > checking R-URI.

even if to header should not be changed, it may still contain anything.

-- juha