Interesting that the initfs busybox has strings (unlike the rootfs one). I hadn't looked too closely at it before, but it also includes a bunch of other stuff (bunzip2, bzcat, clear, deallocvt, dumpkmap, fdisk, ftpget, halt, hexdump, [[, install, klogd, loadfont, loadkmap, openvt, patch, pidof, poweroff, readprofile, reboot, reset, strings, syslogd, udhcpc, unzip, usleep, watch, wget) missing from the rootfs busybox (though some are provided by other packages).