sysconf: Include unistd.h

The manpage for sysconf() suggest including unistd.h as the
function is declared there. Even though we are not hitting any
compile issues currently, let's include the correct header file
instead of relying on some hidden include chain.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>

src/nodeinfo.c

@@ -33,6 +33,7 @@
 #include "conf/domain_conf.h"
 #include <fcntl.h>
 #include <sys/ioctl.h>
+#include <unistd.h>
 
 #if HAVE_LINUX_KVM_H
 # include <linux/kvm.h>

src/qemu/qemu_conf.h

@@ -24,6 +24,8 @@
 #ifndef __QEMUD_CONF_H
 # define __QEMUD_CONF_H
 
+# include <unistd.h>
+
 # include "virebtables.h"
 # include "internal.h"
 # include "capabilities.h"

src/util/vircgroup.c

@@ -38,6 +38,7 @@
 #include <sys/types.h>
 #include <signal.h>
 #include <dirent.h>
+#include <unistd.h>
 
 #define __VIR_CGROUP_ALLOW_INCLUDE_PRIV_H__
 #include "vircgrouppriv.h"

src/util/vircommand.c

@@ -29,6 +29,7 @@
 #include <sys/stat.h>
 #include <sys/wait.h>
 #include <fcntl.h>
+#include <unistd.h>
 
 #if WITH_CAPNG
 # include <cap-ng.h>

tools/virt-login-shell.c

@@ -29,6 +29,7 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 #include "internal.h"
 #include "virerror.h"