Wolfgang Bumiller authored Nov 15, 2013 and Allan McRae committed Dec 15, 2013

FreeBSD chroot(2) fails with EPERM when a directory file descriptor is open
with either `kern.chroot_allow_open_directories` being 0, or when the process
already is inside a chroot.  This is exposed in alpm_run_chroot that uses
opendir() to open a file descriptor to the current directory before doing
the forking and chrooting.  Since the file descriptor is not used in the
forked process, we close it.

Fixes FS#36161.

Signed-off-by: Allan McRae <allan@archlinux.org>