Always use <poll.h>, no modern system needs <sys/poll.h>

This was standardized in IEEE 1003.1-2001, so more than 20 years old.

Verified following systems using online resources:
- FreeBSD 3.0 (1998)
- NetBSD 1.3 (1998)
- OpenBSD 2.0 (1996)
- CentOS 5.0 (2007)
- Debian 4.0 (2007)
- IRIX 6.5.30 (2006)
- SunOS 4.1.3 (1992)
- SUSE 10.2 (2008)
- Red Hat 5.0 (1998)

So the check used for BSDs on vcl/unx/generic/dtrans/X11_selection.cxx
was never correct.

On GNU/Linux specifically, <poll.h> is provided since glibc 2.0 (1997).

musl libc produces the following warning if the non-standard header is
included:

    /usr/include/sys/poll.h:1:2: warning: #warning redirecting incorrect #include <sys/poll.h> to <poll.h> [-Wcpp]

Change-Id: Ia8f4b9e1ee069f86abe03140c18a77d17336d09c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/127666
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>
(cherry picked from commit 4242c7b91887236375e08e2b6b24de0cecbf1626)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/127586
Reviewed-by: Ismael Luceno <ismael@iodev.co.uk>
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>

0 files changed, 0 insertions, 0 deletions