Bug correction in dokeysto.4.0.2 impacting three packages

[UnixJunkie]

dokeysto, dokeysto_camltc, dokeysto_lz4

Any software relying on dokeysto should use this new version (4.0.2).

Really stupid use of Unix.read somewhere replaced by a really_read function (like Stdlib.really_input but for Unix file descriptors).

[jmid]

Thanks!

CI is failing

• on opam-2.0 (these can be ignored)
• on Fedora-42 (which looks like an internal CI issue)
• on x86_32-ocaml-4.14 running the test suite for dokeysto_camltc with Fatal error: exception Failure("stat error"). The package installs cleanly though.
• on Windows compiling dokeysto_camltc
• on Windows installing mingw-w64-shims.0.2.0

Potentially we could add

• available: os != "win32" for dokeysto_camltc and
• guard with-test for dokeysto_camltc with arch != "x86_32"

Finally: Would you consider adding x-maintenance-intent entries for these packages?
https://github.com/ocaml/opam-repository/blob/master/governance/policies/archiving.md