busybox: update to version 1.25.0

The following patches were removed:
010-networking-fix-uninitialized-memory-when-displaying-.patch
  https://git.busybox.net/busybox/commit/?id=f2c043acfcf9dad9fd3d65821b81f89986bbe54e

030-ip-fix-problem-on-mips64-n64-big-endian-musl-systems.patch
  https://git.busybox.net/busybox/commit/?id=4ab372d49a6e82b0bf097dedb96d26330c5f2d5f

204-udhcpc_src_ip_rebind.patch
  https://git.busybox.net/busybox/commit/?id=abe8f7515aded80889d78c2c1c8947997918cf90

230-ntpd_delayed_resolve.patch
  https://git.busybox.net/busybox/commit/?id=c8641962e4cbde48108ddfc1c105e3320778190d
  https://git.busybox.net/busybox/commit/?id=e4caf1dd9ce8569371a0eeb77ccf02a572dc0f11

260-arping_missing_includes.patch
  Not needed any more, still builds with musl for me.
  Add in 92fd6e6f1a "busybox: fix arping applet building on musl"

The Kconfig files were updated with these commands:
cd config
../convert_menuconfig.pl .../build_dir/target-*/busybox-1.25.0
cd ..
./convert_defaults.pl < .../build_dir/target-*/busybox-1.25.0/.config > Config-defaults.in

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

package/utils/busybox/config/util-linux/Config.in

@@ -6,6 +6,11 @@
 
 menu "Linux System Utilities"
 
+config BUSYBOX_CONFIG_BLKDISCARD
+	bool "blkdiscard"
+	default BUSYBOX_DEFAULT_BLKDISCARD
+	help
+	  blkdiscard discards sectors on a given device.
 config BUSYBOX_CONFIG_BLOCKDEV
 	bool "blockdev"
 	default BUSYBOX_DEFAULT_BLOCKDEV
@@ -174,11 +179,34 @@ config BUSYBOX_CONFIG_FEATURE_MOUNT_OTHERTAB
 	default BUSYBOX_DEFAULT_FEATURE_MOUNT_OTHERTAB
 	help
 	  Support mount -T (specifying an alternate fstab)
+config BUSYBOX_CONFIG_NSENTER
+	bool "nsenter"
+	default BUSYBOX_DEFAULT_NSENTER
+	select BUSYBOX_CONFIG_PLATFORM_LINUX
+	help
+	  Run program with namespaces of other processes.
+
+config BUSYBOX_CONFIG_FEATURE_NSENTER_LONG_OPTS
+	bool "Enable long options"
+	default BUSYBOX_DEFAULT_FEATURE_NSENTER_LONG_OPTS
+	depends on BUSYBOX_CONFIG_NSENTER && BUSYBOX_CONFIG_LONG_OPTS
+	help
+	  Support long options for the nsenter applet. This makes
+	  the busybox implementation more compatible with upstream.
 config BUSYBOX_CONFIG_REV
 	bool "rev"
 	default BUSYBOX_DEFAULT_REV
 	help
 	  Reverse lines of a file or files.
+config BUSYBOX_CONFIG_SETARCH
+	bool "setarch"
+	default BUSYBOX_DEFAULT_SETARCH
+	select BUSYBOX_CONFIG_PLATFORM_LINUX
+	help
+	  The linux32 utility is used to create a 32bit environment for the
+	  specified program (usually a shell). It only makes sense to have
+	  this util on a system that supports both 64bit and 32bit userland
+	  (like amd64/x86, ppc64/ppc, sparc64/sparc, etc...).
 config BUSYBOX_CONFIG_UEVENT
 	bool "uevent"
 	default BUSYBOX_DEFAULT_UEVENT
@@ -186,6 +214,13 @@ config BUSYBOX_CONFIG_UEVENT
 	help
 	  uevent is a netlink listener for kernel uevent notifications
 	  sent via netlink. It is usually used for dynamic device creation.
+config BUSYBOX_CONFIG_UNSHARE
+	bool "unshare"
+	default BUSYBOX_DEFAULT_UNSHARE
+	depends on BUSYBOX_CONFIG_LONG_OPTS && !BUSYBOX_CONFIG_NOMMU
+	select BUSYBOX_CONFIG_PLATFORM_LINUX
+	help
+	  Run program with some namespaces unshared from parent.
 
 config BUSYBOX_CONFIG_ACPID
 	bool "acpid"
@@ -669,16 +704,6 @@ config BUSYBOX_CONFIG_SCRIPTREPLAY
 	  This program replays a typescript, using timing information
 	  given by script -t.
 
-config BUSYBOX_CONFIG_SETARCH
-	bool "setarch"
-	default BUSYBOX_DEFAULT_SETARCH
-	select BUSYBOX_CONFIG_PLATFORM_LINUX
-	help
-	  The linux32 utility is used to create a 32bit environment for the
-	  specified program (usually a shell). It only makes sense to have
-	  this util on a system that supports both 64bit and 32bit userland
-	  (like amd64/x86, ppc64/ppc, sparc64/sparc, etc...).
-
 config BUSYBOX_CONFIG_SWAPONOFF
 	bool "swaponoff"
 	default BUSYBOX_DEFAULT_SWAPONOFF