dhcpcd: create dhcpcd user and chroot folder

dhcpcd 9.x adds privelege seperation by creating a chroot
and running parts of the client not as root.

Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>

src/initscripts/system/mountkernfs

@@ -34,6 +34,11 @@ case "${1}" in
 			mount -n -t tmpfs -o nosuid,nodev,mode=755,size=8M /run /run || failed=1
 		fi
 
+		# create folder for dhcpcd changeroot
+		mkdir -p /run/dhcpcd/chroot
+		chown dhcpcd:dhcpcd /run/dhcpcd/chroot
+		chmod 750 /run/dhcpcd/chroot
+
 		boot_mesg "" ${NORMAL}
 
 		(exit ${failed})