[Serusers] rewriting domain

[Maciej Świniarski]

i have stupid hardphone, proxy, registrer server is always domain :/

I have configured DNS and ser to use some domain.com as sip domain, but
proxy have sip.mydomain.com addres. Registering is no problem because i
can tell what domain ser should search but problem is for examplke with
aliases i don't want write every time `serctl alias add
user at domain.com` `serctl alias add user at sip.domain.com`

if (uri=~".*sip\.my\.domain\.com") {
rewritehost("my.somain.com";
}
don't work becaus it rewrites requested uri

i hope you get my point.
Any one know how to solve this problem?