Bug#712074: [libc0.1-dev] provide F_DUPFD_CLOEXEC

[Petr Salinger <Petr.Salinger@seznam.cz>]

Package: libc0.1-dev
Version: 2.17-5
Severity: wishlist
User: debian-bsd@lists.debian.org
Usertags: kfreebsd

Please sync <bits/fcntl.h> with current upstream, mainly

#define F_DUPFD_CLOEXEC 17  /* Like F_DUPFD, but FD_CLOEXEC is set */
#define F_DUP2FD_CLOEXEC 18 /* Like F_DUP2FD, but FD_CLOEXEC is set */

and provide appropriate wrapper of fcntl() to work also under older 
(wheezy: 8.3, 9.0) kernels. See #711529 for reasoning.

Mostly reminding myself

				Petr