ssl to more than one server

I succeded to connect to one postgresql server with ssl.
Now it's the time of the second... but postgresql clients (pgsql)
just look at ~/.postgresql/postgresql.(key|crt)
So I can't put in ~/.postgresql/ another [].crt coming from another
server.

What should I do to keep stuff separate?

thanks

--
Ivan Sergio Borgonovo
http://www.webthatworks.it