feature request - subdomain alias

[zozzi]

i'm very pleased with domain alias in plesk 8.1

but is it possible to include some kind of similar function?

subdomain alias

example:

subdomain.example.com - this is real subdomain with directory, ftp account etc ...

anotherdomain.example.com - this should either :
1) forward users to subdomain.example.com
2) setup serveralias in apache
servername subdomain.example.com,
serveralias anotherdomain.example.com