Log message:
shells/oksh: Update oksh to 7.4

- Remove broken special handling of test -t
- consistently escape control characters when displaying file name
  completions, even when there are multiple matches
- added kefir compiler support

Log message:
Indent, and remove comment inadvertently added in previous.

Log message:
Update to 7.3. From the changelog:

- Add missing return types to configure checks (#71)
- Omit version in SMALL ksh builds
- Reformat some multiline markup
- Remove array reference from sh(1)

Log message:
oksh: update to 7.2.

No ChangeLog available.

Log message:
shells: Replace RMD160 checksums with BLAKE2s checksums

All checksums have been double-checked against existing RMD160 and
SHA512 hashes

Log message:
Update to 7.0. From the changelog:

- Use old conversion of clock_gettime on macOS prior to 10.12
- Manpage tweak: shell scripts should use getopts instead of getopt
- In addition to 2-byte and 3-byte UTF-8 sequences, correctly identify
  all 4-byte UTF-8 sequences
- Do not permit an empty list between "while" and "do"

Log message:
shells: Remove SHA1 hashes for distfiles

Log message:
Update to 6.9. From the changelog:

- This is oksh-6.9, matching ksh(1) from OpenBSD 6.9 with portability
  additions.

From the OpenBSD 6.9 changelog:

- Fixed ksh(1) redrawing of a multiline PS1 prompt in vi mode and added
  support for ^R (redraw) in insert mode.

Log message:
Update to 6.8.1. From the changelog:

- Fix build on musl-libc platforms (#49)
- Default CFLAGS of -g -O2 if user didn't specify any
- Fix a bug on Linux systems (#48)
- Add an OKSH_VERSION variable that gives the user the oksh version
  (KSH_VERSION and SH_VERSION are still their original values)
- Default to ST_MTIM when using --no-thanks
- Allow some code to be commented out when not compiling with curses

Log message:
Update to 6.7.1. From the git log:

- Solaris has a function named sig2str. Rename ours oksh_sig2str.
- Pull in latest upstream code, which is #43 from Michael Forney.
- Make BINDIR and MANDIR actually depend on PREFIX.
- Variables have $'s.
- Older Linux has clock_gettime in librt; check for that.
- configure: improve clock_gettime diagnostic messages.
- HP-UX support.
- Add --enable-lto for those who want link-time optimization.
- Update to latest OpenBSD code.
- Make cross compiling a real possibility, with instructions.
- Fix typo.
- For loop initial declarations is a better C99 check for older gcc.
- Update from OpenBSD.
- Separate out compilation and linking in configure tests.
- Only add -std=gnu99 if using --no-thanks.
- If using --no-thanks and you didn't specify the environment
- --no-thanks isn't just for cross compiling
- Default to ST_MTIM when using --no-thanks