It is signed by H2O Test CA which is not bundled in the repository as an ordinary file, while others are signed by picotls test ca which is bundled as t/assets/test-ca.crt.
To allow tests on the loopback interface, its CN is 127.0.0.1.xip.io. However, we do not have tests using loopback and xip.io has ceased to exist a long time ago.
It is expiring soon.
This PR renews the certificate to one issued by picotls test ca with CN changed to rsa.test.example.com in alignment with other certificates used for testing.
The current certificate has three issues:
This PR renews the certificate to one issued by picotls test ca with CN changed to rsa.test.example.com in alignment with other certificates used for testing.