conf: add prefix in virDomainNetDefParseXML
conf: add prefix in virDomainNetDefParseXML

And use the newly added caps->host.netprefix for free interface
names that match the autogenerated target names.

Signed-off-by: Joao Martins <7c86cc079af931b7847bbaae227ac1245d2901a0@oracle.com>

zippy2/libvirt,eskultety/libvirt,olafhering/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,eskultety/libvirt,jfehlig/libvirt,olafhering/libvirt,jfehlig/libvirt,eskultety/libvirt,crobinso/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,zippy2/libvirt,libvirt/libvirt,nertpinx/libvirt,datto/libvirt,olafhering/libvirt,andreabolognani/libvirt,datto/libvirt,taget/libvirt,rlaager/libvirt,libvirt/libvirt,nertpinx/libvirt,eskultety/libvirt,datto/libvirt,jfehlig/libvirt,rlaager/libvirt,datto/libvirt,rlaager/libvirt,libvirt/libvirt,crobinso/libvirt,rlaager/libvirt,fabianfreyer/libvirt,taget/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,taget/libvirt,jardasgit/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,taget/libvirt,libvirt/libvirt,nertpinx/libvirt,olafhering/libvirt,eskultety/libvirt,fabianfreyer/libvirt,crobinso/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,zippy2/libvirt,jardasgit/libvirt,taget/libvirt,rlaager/libvirt,crobinso/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,datto/libvirt,andreabolognani/libvirt,zippy2/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,nertpinx/libvirt