Fail gracefully if --fq-rate or --no-fq-socket-pacing are specified on

platforms where they aren't supported.

Requested by:	@bltierney

src/iperf_api.c

@@ -958,8 +958,7 @@ iperf_parse_arguments(struct iperf_test *test, int argc, char **argv)
 		test->settings->fqrate = 0;
 		client_flag = 1;
 #else /* HAVE_SO_MAX_PACING_RATE */
-		i_errno = IEUNIMP;
-		return -1;
+		printf("Warning:  --no-fq-socket-pacing not supported on this platform, ignoring\n");
 #endif
 		break;
 	    case OPT_FQ_RATE:
@@ -967,8 +966,7 @@ iperf_parse_arguments(struct iperf_test *test, int argc, char **argv)
 		test->settings->fqrate = unit_atof_rate(optarg);
 		client_flag = 1;
 #else /* HAVE_SO_MAX_PACING_RATE */
-		i_errno = IEUNIMP;
-		return -1;
+		printf("Warning:  --fq-rate not supported on this platform, ignoring\n");
 #endif
 		break;
             case 'h':