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.

The reason is that this is more appropriate if for example we modify
patches on commit not yet build but released older version. Such state
would not compile so instead we have to choose packages version. The
changes in updater's lists should not have such effect.