(A version of) gcc had been giving somewhat odd "trigraph" warnings about

this construct, and Ulf provided the following insight as to why;

> ANSI C compliant compilers must substitute "??)" for "]" because your
> terminal might not have a "]" key if you bought it in the early 1970s.

So we escape the final '?' to avoid this pathological case.

ssl/ssl_ciph.c

@@ -1001,7 +1001,7 @@ char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
 		case 128: enc="AES(128)"; break;
 		case 192: enc="AES(192)"; break;
 		case 256: enc="AES(256)"; break;
-		default: enc="AES(???)"; break;
+		default: enc="AES(??\?)"; break;
 			}
 		break;
 	default: