ftp: fix port number range loop for PORT commands#18636
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If the last port to test is 65535, the loop would previously wrongly wrap the counter and start over at 0, which was not intended. Reported in Joshua's sarif data
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If the last port to test is 65535, the loop would previously wrongly wrap the counter and start over at 0, which was not intended.
Reported in Joshua's sarif data