[libvirt] [PATCH 0/7] Various bugfixes related to device management

This series contains 7 patches that are mostly related by the face that I noticed the problems they're solving while writing the <interface type='hostdev'> code during the past couple weeks. After that series was pushed, I sat down to fix everything I'd noticed before I forgot about it. I'm sending it as a single series rather than individual patches just to that they're easier to keep track of.