This is only for HBL branch. Because Turris Auth was introduced in
OpenWrt 19.07 and OpenWrt 21.02. It should be only for OpenWrt 21.02,
because it requires new version of Python.

The patch, which I am removing is not ready. We can not use upstreamed
MariaDB version from OpenWrt as there are a few issues with it.

Let's drop this patch for now and let's see in the future, if we can
drop mariadb from turrisospackages repository.

Drop revert patches related to Turris Auth.
Turris Auth works only with OpenWrt 21.02+

Unfortunately, Turris Auth requires newer version of Python3, which is
not available in OpenWrt 19.07. Thus it is meant only for OpenWrt 21.02.

This version probably is not going to be introduced, but we need to
distinguish version in HBK and HBL.

It was necessary to rebase it as there were some tuning details done in
OpenWrt 21.02.

(cherry picked from commit a048bf46)
[bump PKG_RELEASE in another branch]

It was necessary to rebase it as there were some tuning details done in
OpenWrt 21.02.

This backports one patch that is already in OpenWrt's master and another
one (mine) that is submitted to the master. I place it to to the
backport diretory as well as it is backport from master in the end.

These modules help to implement better rainbow. The uleds module can be
used to get LED triggers or even fake leds in a way to support old
platforms that do not have kernel driver.

The pattern trigger then can be used for animations.

The git-hash file for lists now has the same format as for packages.
Thus we have to test it separately as well as to extract hash from it
using the same function.
It is also now specified in feeds.conf file so we have to set
appropriate has to it as well.

This also adds `set -eu` to the script to make it more resilient.
There is also a tweak of indentation.