There were two patches in patches/openwrt/to-upstream directory that
were fixes of hack patch. Those of course should not be send to upstream
and should be part of that specific patch. This commit merges those
patches to that patch.

This reverts commit 0d08bada.

This patch wasn't sent to upstream yet. That is an error.

These patches seems to be already present in tree so we can drop them
from this patch.

Let's see if upstream fixed problems we had. These no longer apply so we
would have to reimplement them anyway.

Let's hope that this fixes problems with kernel 4.19 compilation.

In Turris OS 3.x opkg was the package containing
/etc/opkg/distfeeds.conf. This file with TOS 4.0+ was moved by upstream
to base-files. This means hat we also have to move postinst for that
file update to base-files from opkg package. This should fix OPKG feeds
being reseted by update.

Note: upstream merged part of configuration to default definition. We
should probably include that as well. This does not implement that. When
this patch is about to be pushed to upstream we should integret this in
better way.

This drops problematic chunk with CMAKE_INSTALL bump. This patch is
already in our tree for one update and this chunk is causing problems
with patch application every time upstream updates procd.