My patch, which was present in the hack folder, is no longer applying as
mariadb was updated in OpenWrt 18.06, 19.07 and master branches.
This patch was meant to be a workaround as something in OpenWrt was
changed and it caused inconsistency in the installation of packages and we
would like to have provided mariadb in our feed, this was the easiest
and a quicker solution at that time.

Solution is provided in this commit: a42ef21a740653ee76146bfccee1ab6afbd65539

The empty `space` variable in Makefile for hostapd was causing that
invalid Kconfig was generated and configuration phase failed.

This is happening only with latest GNUMake.

Next year...

It seems that setting quirks on our platform results to timeout issues
when using SD card. It was working fine before quirks were introduced so
let's revert them just for now.

The names were changed:
* v4.0 -> hbk
* v4.1 -> hbl
* v5.0 -> hbd

Branch for-v4.0 was renamed to master and master to develop.

This reverts commit efbd0717.

It seems that upstream did not fix it nonetheless.

This moves version file generation right after clean. This ensures that
we really report OpenWrt hash and not our patch commit that is created
to extend ignore list.

This also uses different git command that has lower overhead and is
intended more for this kind of operation.

Change .asciidoc to more standard and shorter .adoc.

This potentially breaks some links to workflow in master from outside
but in general is has to happen to be consistent with other projects and
future changes in them.