asciidoc internal links must be:
 [[Hello]] Hello::
 This is how to say hello

not:
 [[Hello]]
 Hello::
 This is how to say hello

driver-howto.txt => driver_howto.txt
in line with the other docs.

Is there any info available on the crypto status codes,
similar to the KISS or FLASH codes?

The TOC in this document had been copied from quick.txt
commit 1690b354