explicitly note that util-linux's mount/swap are required

Signed-off-by: zhaoxiaohu <zhaoxiaohu@kuaishou.com>

backport-README-explicitly-note-that-util-linux-s-mount-swap-.patch

@@ -0,0 +1,40 @@
+From 59c2b054cf3ea900915902e921f9fe4bdf1c039c Mon Sep 17 00:00:00 2001
+From: Luca Boccassi <bluca@debian.org>
+Date: Fri, 10 Feb 2023 11:58:20 +0000
+Subject: [PATCH] README: explicitly note that util-linux's mount/swap are
+ required
+
+These are the most visible and hard requirements, as we use options that
+busybox does not provide, so list them explicitly to avoid surprises
+
+(cherry picked from commit 164070e497f36b6d8055e4338e07188dd975f6f2)
+(cherry picked from commit 0dc9f7335d37be2a90f34e20f04573331bf3e4d3)
+(cherry picked from commit facb134183d72c31636f09bcae080cf9337a6877)
+(cherry picked from commit 3271bc9bec20345edc09c7209852c90bafde874a)
+
+Reference: https://github.com/systemd/systemd-stable/pull/259/commits/59c2b054cf3ea900915902e921f9fe4bdf1c039c
+
+Signed-off-by: zhaoxiaohu <zhaoxiaohu@kuaishou.com>
+Signed-off-by: yuwang <yuwang@kuaishou.com>
+---
+ README | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/README b/README
+index 0e5c326..a7ecbbd 100644
+--- a/README
++++ b/README
+@@ -202,7 +202,9 @@ REQUIREMENTS:
+         During runtime, you need the following additional
+         dependencies:
+ 
+-        util-linux >= v2.27.1 required
++        util-linux >= v2.27.1 required (including but not limited to: mount,
++                                        umount, swapon, swapoff, sulogin,
++                                        agetty, fsck)
+         dbus >= 1.4.0 (strictly speaking optional, but recommended)
+                 NOTE: If using dbus < 1.9.18, you should override the default
+                 policy directory (--with-dbuspolicydir=/etc/dbus-1/system.d).
+-- 
+2.33.0
+