Send a correct length of a query response #86
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As shown in examples in Section 5.3 from RFC 1205 [0] and Section 15-130 from SC30-3533-04 [1], Client should reply to a Write Structured Field command with Row/Column (2 bytes), AID Code (1 byte) and Structured Field. Structured Field should begin with Length (2 bytes; including the length bytes) followed by data specific to a command.
Note that tn5250j already included the correct length in a comment but still sent 64 instead of 61.
[0] https://datatracker.ietf.org/doc/html/rfc1205
[1] IBM. 5494 Remote Control Unit - Functions Reference. SC30-3533-04
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