Hi Gabriel,

I've rebased this patch onto current master (attached).  I've also made 
some changes in a third patch that I'd like *you* to review, and ideally 
test.

Some remarks:
- For the commit message, I prefer ‘services: foo:’ to ‘gnu: services:’.
- Use the previous Texinfo @node{} title in the commit message.
- I added bind-interfaces? only because it occurs in my documentation 
for another new option.
- I don't use the dnsmasq service so I'm not 100% confident about some 
of my changes.  Please let me know if, for example, something doesn't 
make sense as a list.

Thanks!

T G-R

Sent from a Web browser.  Excuse or enjoy my brevity.