Forgot to add fix NOT_AVAILABLE stub code for Lwt_unix.send_msgto to 5.4.1

[MisterDA]

IIUC commit 5ffe09f fix NOT_AVAILABLE stub code for Lwt_unix.send_msgto is a bug fix on Windows that add noop symbols for functions introduced in 20e8836 lwt.unix: add Lwt_unix.send_msgto that takes a destination address. I f the commit isn't present it leads to link failure on Windows, as happens with ocaml-community/utop#356. The bug-fix wasn't included in the 5.4.1 release.
I'd suggest releasing a 5.4.2 with this patch ;)

Error: Error while linking C:\\Users\\antonin\\.opam\\ocaml-variants.4.12.0+mingw64c\lib\lwt\unix/lwt_unix.cma(Lwt_unix):
       The external function `lwt_unix_send_msg_byte' is not available

[raphael-proust]

I have pushed a 5.4.2 branch with this fix. I'll release next week. Thanks for the bug-report.

[raphael-proust]

ocaml/opam-repository#19185
https://github.com/ocsigen/lwt/releases/tag/5.4.2