TFTP Service minor - update

javascript/udp/detection/tftp-detect.yaml

@@ -12,9 +12,7 @@ info:
     shodan-query: "port:69"
   tags: js,tftp,udp,network
 javascript:
-  - pre-condition: |
-      isPortOpen(Host,Port);
-    code: |
+  - code: |
       let packet = bytes.NewBuffer();
       let message = "1.txt"
       let data = message;
@@ -33,4 +31,5 @@ javascript:
       - type: word
         words:
           - "Unknown transfer ID"
+        case-insensitive: true  
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