Make -o/printCert not load any files, pledge even earlier

No point in trying to load a self-signed server certificate which we
are about to get from the server in the first place.

No need to read client certificate/key files when all we want is the
server certificate:  in TLS the server always sends its certificate
before the client replies with any key material, i.e. catgirl sending
client data is useless.

catgirl(1) synopsis also notes how these options are irrelevant in the
-o/printCert case.

As a result, ircConfig() no longer requires any filesystem I/O in this
case, so hoist the purely network I/O related pledge() call to enforce
this -- more secure, self-documenting code!

chat.c

@@ -220,7 +220,7 @@ int main(int argc, char *argv[]) {
 			break; case 'l': log = true; logOpen();
 			break; case 'm': self.mode = optarg;
 			break; case 'n': nick = optarg;
-			break; case 'o': insecure = true; printCert = true;
+			break; case 'o': printCert = true;
 			break; case 'p': port = optarg;
 			break; case 'r': real = optarg;
 			break; case 's': save = optarg;
@@ -234,11 +234,11 @@ int main(int argc, char *argv[]) {
 	if (!host) errx(EX_USAGE, "host required");
 
 	if (printCert) {
-		ircConfig(insecure, trust, cert, priv);
 #ifdef __OpenBSD__
 		int error = pledge("stdio inet dns", NULL);
 		if (error) err(EX_OSERR, "pledge");
 #endif
+		ircConfig(true, NULL, NULL, NULL);
 		ircConnect(bind, host, port);
 		ircPrintCert();
 		ircClose();