This simplifies writing markdown docs (no need to specify relative path
to images)

PUBLISHED_FROM=039a563b2f7e6a2fbb2a9424ac5315b2496ca184

Comments in headers are changed a bit: removed adoc-specific stuff,
markdown is used instead

PUBLISHED_FROM=9242cce85cc52a47a197d377e7e23804721a6bb5

This will allow to recreate the metadata after patching the FS.

PUBLISHED_FROM=dae228bbf49d71f383e4dc52316cf98aba3914f5