do not mount using --bind, also use make-private for /dev, /dev/pts

when using --bind and not make-private we had problems when using fai dirinstall
It always left on more mount to /dev/pts, having many mount entries
after several dirinstall

lib/subroutines

@@ -5,7 +5,7 @@
 # subroutines -- useful subroutines for FAI
 #
 # This script is part of FAI (Fully Automatic Installation)
-# (c) 2000-2023 by Thomas Lange, lange@cs.uni-koeln.de
+# (c) 2000-2024 by Thomas Lange, lange@cs.uni-koeln.de
 # Universitaet zu Koeln
 # (c) 2001-2005 by Henning Glawe, glaweh@physik.fu-berlin.de
 # Freie Universitaet Berlin
@@ -190,9 +190,13 @@ ctam() {
         return
     fi
 
-    for f in /sys /proc /dev /dev/pts; do
-        mount --bind $f ${target}$f
-    done
+    mount -t proc   proc   $target/proc
+    mount -t sysfs  sysfs  $target/sys
+    mount --bind    /dev   $target/dev
+    mount --make-private   $target/dev
+    mount -t devpts devpts $target/dev/pts
+    mount --make-private   $target/dev/pts
+
     if [ "$FAI_ACTION" = "softupdate" -o "$FAI_ACTION" = "dirinstall" ]; then
         :  # do not mount efivars for these actions
     else