These are list aliases and we have them here so users with TOS 4.0-beta1
can update to future releases. With some future release we can revert
this commit and that way drop this. It does not have to exist for long
time after final release or even before it.

I don't see a reason why we should exclude usb2 from base installation.
It is hardware support and all our devices do have usb ports so let's
support them in default in their completeness.

Upstream dropped openssl variant and uses only cryptsetup with kernel
backend.

This implements support for new updater with relative URI and no model
variable.

OpenWrt decided to enable them in kernel config instead of packaging
them and probably we will need to upstream to OpenWrt
kmod-crypto-marvell-cesa

Source:
https://git.openwrt.org/?p=openwrt/openwrt.git;a=commitdiff;h=f849c2c83247340d623fdb549e2b75f4c1feea62

In fact they provide same utilities,only difference is in name of symlinks

There has to be step between 3.x and 4.x version because of other
reasons than updater's incompatibility. That gives us possibility to
define new lowest supported version of updater-ng for 4.x releases.
Thanks to that we can remove some obsolete crap.

It is planned to bump minimal version of updater even higher as soon as
relevant updater's release is out.

Signed-off-by: Michal Hrusecky <Michal@Hrusecky.net>

Signed-off-by: Michal Hrusecky <Michal@Hrusecky.net>