Fix privileges on /var/run/libvirt directory

Previous commit

  commit 32a9aac2e0
  Author: William Jon McCann <william.jon.mccann@gmail.com>
  Date:   Thu May 3 12:36:27 2012 -0400

    Use XDG Base Directories instead of storing in home directory

Accidentally changed the umask when creating /var/run/libvirt
to 077. This prevents /var/run/libvirt being readable by non-root,
which is required for non-root to connect to libvirtd. Fix the
code so that umask 077 is only used for the non-privileged libvirtd
instance.

daemon/libvirtd.c

@@ -1131,6 +1131,9 @@ int main(int argc, char **argv) {
         goto cleanup;
     }
 
+    if (privileged)
+        old_umask = umask(022);
+    else
         old_umask = umask(077);
     if (virFileMakePath(run_dir) < 0) {
         char ebuf[1024];