Add support for deleting or clearing all flows:
web/delete_flow.py all
web/clear_flow.py all
diff --git a/src/main/java/net/floodlightcontroller/flowcache/web/ClearFlowResource.java b/src/main/java/net/floodlightcontroller/flowcache/web/ClearFlowResource.java
index 8fff358..7f3b589 100644
--- a/src/main/java/net/floodlightcontroller/flowcache/web/ClearFlowResource.java
+++ b/src/main/java/net/floodlightcontroller/flowcache/web/ClearFlowResource.java
@@ -27,11 +27,16 @@
 
 	// Extract the arguments
 	String flowIdStr = (String) getRequestAttributes().get("flow-id");
-	FlowId flowId = new FlowId(flowIdStr);
-	log.debug("Clear Flow Id: " + flowIdStr);
 
 	// Process the request
-	result = flowService.clearFlow(flowId);
+	if (flowIdStr.equals("all")) {
+	    log.debug("Clear All Flows");
+	    result = flowService.clearAllFlows();
+	} else {
+	    FlowId flowId = new FlowId(flowIdStr);
+	    log.debug("Clear Flow Id: " + flowIdStr);
+	    result = flowService.clearFlow(flowId);
+	}
 	return result;
     }
 }