Log message:
oksh: update to 7.8

- Bump release to oksh 7.8 (README + OKSH_VERSION)
- Improve portability: detect IBM XL C in configure, set xlc flags;
  add Darwin/xlc stddef.h workaround note; document XL C on Tiger
- Fix test builtin -nt/-ot to use timespec mtime (st_mtim + timespeccmp)
- Harden prompt rendering: handle localtime() failure in prompt escapes
- Reject NUL bytes in input (shf.c) with a syntax error
- Safer history-relative parsing: replace atoi with strtonum
- vi line editor: multiple UTF-8/tab/windowing cursor/display fixes
- Update manpages (case syntax clarification + minor mdoc cleanups)

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