TN3270 conversation type

The TN3270 connector checks the settings below; changes affect current and new conversations.

[Logging]
client-close=client-close-logging

[Operation]
allow-any-terminal-type=terminal-type-option
default-printer-mode=LU1-or-LU3
default-terminal-type=terminal-type-name
new environ=environ-option
output resets timeout=output-resets-option
printers time out=printers-timeout-option
serialize=serial-option
SGA=suppress-go-ahead-option
timeout=number-of-seconds
TN3270E=negotiation-type
validate=address-validation
[Trace]
trace=control-flow-trace
data=data-trace
length=trace-length
sem=send-semaphore-trace
file=trace-filename
[DCAS]
name=DcasCtr