Out-of-tree certificate interferes ssltest

Hello.

003_sslinfo.pl fails for me.

ok 6 - ssl_client_cert_present() for connection with cert
connection error: 'psql: error: connection to server at "127.0.0.1", port 61688 failed: could not read certificate file "/home/horiguti/.postgresql/postgresql.crt": no start line'
while running 'psql -XAtq -d sslrootcert=ssl/root+server_ca.crt sslmode=require dbname=trustdb hostaddr=127.0.0.1 user=ssltestuser host=localhost -f - -v ON_ERR

I think we don't want this behavior.

The attached fixes that and make-world successfully finished even if I
have a cert file in my home direcotory.

regareds.

--
Kyotaro Horiguchi
NTT Open Source Software Center