Improve log message consistency

tls.go

@@ -58,11 +58,11 @@ func newCertificate(dir string) {
 	fatalErr(err)
 	pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
 	certOut.Close()
-	okln("wrote cert.pem")
+	okln("Created TLS certificate file")
 
 	keyOut, err := os.OpenFile(path.Join(dir, "key.pem"), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
 	fatalErr(err)
 	pem.Encode(keyOut, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(priv)})
 	keyOut.Close()
-	okln("wrote key.pem")
+	okln("Created TLS key file")
 }