Add `testSelfSignedCertificateIsRejectedWithCorrectError`#594

dnadoba merged 3 commits intoswift-server:mainswift-server/async-http-client:mainfrom

dnadoba:dn-self-signed-cert-error-testdnadoba/async-http-client:dn-self-signed-cert-error-testCopy head branch name to clipboard