ioping.1: describe suffixes for -p and -c

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>

ioping.1

@@ -93,6 +93,21 @@ megabytes
 .TP
 .BR g ,\  gb
 gigabytes
+.PP
+For options that expect "number" argument (\fB-p\fR and \fB-c\fR) you
+can optionally specify one of the following suffixes (case-insensitive):
+.TP
+.B da
+deca (tens, 10)
+.TP
+.B k
+kilo (thousands, 1 000)
+.TP
+.B M
+mega (millions, 1 000 000)
+.TP
+.B G
+giga (billions, 1 000 000 000)
 .SH EXIT STATUS
 Returns \fB0\fR upon success. The following error codes are defined:
 .TP