main/busybox: upgrade to 1.36.0

Notable new features:

* HW acceleration for SHA1 and SHA256
	* Supported upstream for x86 and x86_64
	* Broken on x86 musl: http://lists.busybox.net/pipermail/busybox/2023-January/090078.html
* sleep(1) is an ash builtin now
* Custom helper script can now be supplied for udhcpc6
	* We still use /usr/share/udhcpc/default.script for both udhcpc and udhcpc6
	* It seems our default.script is not designed for IPv6 support
	* It may also be worthwhile to move udhcpc6 to -extra in the future
* Various bug fixes

New upstream applets:

* seedrng disabled in Alpine as it is provided by OpenRC already
* tsort (topological sort) disabled in Alpine
* tree (directory listings) enabled in Alpine