tc: man: change man page and comment to confirm to code's behavior.

Since the get_rate() code incorrectly interpreted bare number, the
behavior is not the same as man page and comment described.

We need to change the man page and comment for compatible with the
existing usage by scripts.

man/man8/tc.8

@@ -259,6 +259,9 @@ All parameters accept a floating point number, possibly followed by a unit.
 .P
 Bandwidths or rates can be specified in:
 .TP
+bps
+Bytes per second
+.TP
 kbps
 Kilobytes per second
 .TP
@@ -271,8 +274,8 @@ Kilobits per second
 mbit
 Megabits per second
 .TP
-bps or a bare number
-Bytes per second
+bit or a bare number
+Bits per second
 .P
 Amounts of data can be specified in:
 .TP

tc/tc_util.c

@@ -153,7 +153,7 @@ int get_rate(unsigned *rate, const char *str)
 		return -1;
 
 	if (*p == '\0') {
-		*rate = bps / 8.;	/* assume bytes/sec */
+		*rate = bps / 8.;	/* assume bits/sec */
 		return 0;
 	}