Add forced-out and forcer-err to force the system console to use the output / error stream (fixes #856) #884
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JLine tries to detect a valid output stream, but in cases where output is redirected using a tee command, the output stream is valid, even if not a real system stream.
Using builder.setSystemOutput(SystemOutput.ForcedSysOut) or using
org.jline.terminal.output=forced-out
system property solves the problem.