File Names
*.doc.xml: documentation authored by humans in XML comments,
as specified in gdbus-codegen.
tmp/ref-*.xml: intermediate, produced from *.doc.xml, contains DocBook
"refentry"
../dist/dbus/ref-*.html: rendered for publishing on GitHub Pages
bus/*.bus.xml: output of D-Bus introspection
tmp/*.iface.xml: intermediate, simplified *.doc.xml and *.bus.xml
to leave the common parts for diffing, see make diff.