According to (and since) POSIX.1-1988 it's always <sys/wait.h>; and all
supported systems include it, back to 1995.
AFAICT, none of the systems mention <wait.h> in their manual pages.
musl libc produces the following warning if the non-standard header is
included:
/usr/include/wait.h:1:2: warning: #warning redirecting incorrect #include <wait.h> to <sys/wait.h> [-Wcpp]
Change-Id: Iff1293a08ad080fdc987770596b10ef08cc145a7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/127537
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>
Ismael Luceno
9d0568609b