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+This module matches at a limited rate using a token bucket filter.
+A rule using this extension will match until this limit is reached
+(unless the `!' flag is used). It can be used in combination with the
+target to give limited logging, for example.
+.BI "--limit " "rate"
+Maximum average matching rate: specified as a number, with an optional
+`/second', `/minute', `/hour', or `/day' suffix; the default is
+.BI "--limit-burst " "number"
+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.