clear a topic rather than publish a "-"
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@@ -85,7 +85,7 @@ sub set_berth($$$) {
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sub clear_berth($$) {
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sub clear_berth($$) {
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my ($area, $berth) = @_;
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my ($area, $berth) = @_;
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publish(sprintf("berths/%s/%s", $area||"-", $berth || "-"), "-");
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publish(sprintf("berths/%s/%s", $area||"-", $berth || "-"), undef);
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}
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}
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sub publish($$) {
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sub publish($$) {
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