:iface missing from arp documentation
:iface example
No, I'm not kidding
Merge pull request #34 from SilverFoxx/master

Comment doc fixes and an Error message fix.

Thanks @SilverFoxx!
Merge upstream master in to sync

Now that time has passed, some whitespace-influenced conflicts have
popped up.

This merge was done with `merge todb/master -s recursive -X theirs` in
order to pick up any changes and resolve in upstream's favor.
Retab after sync