mtr.8: Improve help on -i

diff --git a/mtr.8 b/mtr.8
index 8546f934c15a7910be0a0426891a8bedbbd07873..705afebf3ff8f9bb7c1f888e537bb2dc6facb91b 100644 (file)
--- a/mtr.8
+++ b/mtr.8
@@ -320,7 +320,8 @@ what you want).
 .B \-\-interval\ SECONDS
 .br
 Use this option to specify the positive number of seconds between ICMP
-ECHO requests.  The default value for this parameter is one second.
+ECHO requests.  The default value for this parameter is one second.  The
+root user may choose values between zero and one.
 
 .TP
 .B \-m\ NUM