MFC r327514,r327521,r327614,r327615,r327616,r327623:

MFC r327514,r327521,r327614,r327615,r327616,r327623:

morse(6): several improvements

- add ñ, ', and _
- remove lint support
- add missing header for ioctl
- fix two typod
- Use `-r` for "reverse" mode and to match DragonFlyBSD.
- Move defines around to clear up logic
- use `errx` instead of `fprintf` and `exit`
- Use copyright comment header
- Make it easier to compile on !FreeBSD
- Diff reduction against DragonFlyBSD
- bump Dd
- use 'r' instead of 'D' from the original submission

PR:		35109