add limit entry
diff --git a/ebtables.8 b/ebtables.8
index 41829b5..79014b6 100644
--- a/ebtables.8
+++ b/ebtables.8
@@ -561,6 +561,24 @@
17 (UDP). The flag
.B --ip-dport
is an alias for this option.
+.SS limit
+This module matches at a limited rate using a token bucket filter.
+A rule using this extension will match until this limit is reached.
+It can be used with the
+.B --log
+watcher
+to give limited logging, for example. Its use is the same as the limit
+match of iptables.
+.TP
+.BR "--limit " "[\fIvalue\fP]"
+Maximum average matching rate: specified as a number, with an optional
+`/second', `/minute', `/hour', or `/day' suffix; the default is 3/hour.
+.TP
+.BR "--limit-burst " "[\fInumber\fP]"
+Maximum initial number of packets to match: this number gets recharged by
+one every time the limit specified above is not reached, up to this
+number; the default is 5.
+.SS pkttype
.SS mark_m
.TP
.BR "--mark " "[!] [\fIvalue\fP][/\fImask\fP]"