[PATCH 1/4] n_tty: don't mangle tty codes in OLCUC mode

Any terminal younger than ~40 years requires lowercase commands, thus they need to be exempt from uppercasing. And Linux doesn't really support ancient all-uppercase terminals anyway (no XCASE, etc) even if someone made the effort to somehow connect them electrically. This bug is reproducible as

[PATCH 1/4] n_tty: don't mangle tty codes in OLCUC mode

Any terminal younger than ~40 years requires lowercase commands, thus they need to be exempt from uppercasing. And Linux doesn't really support ancient all-uppercase terminals anyway (no XCASE, etc) even if someone made the effort to somehow connect them electrically. This bug is reproducible as