Add clear command when download finished

Change-Id: I610fd257eed78922b4b14dddc3b39f5bf15db70c
diff --git a/cbrs_backup.py b/cbrs_backup.py
index 69a08bc..70359f1 100644
--- a/cbrs_backup.py
+++ b/cbrs_backup.py
@@ -82,3 +82,13 @@
             f.write(chunk)
 
     print(f"{filename} log backup at {timestamp}.")
+
+
+clean_payload = {
+    "this_file": "logsave.htm",
+    "next_file": "logsave.htm",
+    "todo": "logClear",
+}
+
+r = session.post(CGI_URL, data=clean_payload)
+print(f"{serial_number} log cleared.")