Semi automated conversion, in part because Pandoc is kind of buggy for adoc:
Some of the commands were along the lines:
for f in *.md; do pandoc --atx-headers --base-header-level=3 -o ${f%.md}.adoc --wrap=none $f; done
sed -Ei '/\[\[.*\]\]/d' *.adoc
while read -r f; do cat $f; echo; done <f >g
17.10 failed with a similar message to: http://patchwork.ozlabs.org/patch/772848/
but applying that patch did not solve it, apparently there were fixes already
on later versions of the tracked package.
Update .gitmodules to ignore patches we apply to Buildroot.
