Merge branch 'ondrej/statements-following-return-break-continue-or-goto-will-never-be-executed-v9_16' into 'v9_16'

Remove UNREACHABLE() statements after exit() [v9.16]

See merge request isc-projects/bind9!6029

bin/delv/delv.c

@@ -1332,7 +1332,6 @@ dash_option(char *option, char *next, bool *open_type_class) {
 		case 'h':
 			usage();
 			exit(0);
-			UNREACHABLE();
 		case 'i':
 			no_sigs = true;
 			root_validation = false;
@@ -1343,7 +1342,6 @@ dash_option(char *option, char *next, bool *open_type_class) {
 		case 'v':
 			fputs("delv " VERSION "\n", stderr);
 			exit(0);
-			UNREACHABLE();
 		default:
 			UNREACHABLE();
 		}

bin/tests/wire_test.c

@@ -58,7 +58,6 @@ fromhex(char c) {
 
 	fprintf(stderr, "bad input format: %02x\n", c);
 	exit(3);
-	UNREACHABLE();
 }
 
 static void

lib/dns/tests/dnstest.c

@@ -383,7 +383,6 @@ fromhex(char c) {
 
 	printf("bad input format: %02x\n", c);
 	exit(3);
-	UNREACHABLE();
 }
 
 /*

lib/ns/tests/nstest.c

@@ -955,7 +955,6 @@ fromhex(char c) {
 
 	printf("bad input format: %02x\n", c);
 	exit(3);
-	UNREACHABLE();
 }
 
 isc_result_t