Revert "zfs: Only raw volumes are supported"
Revert "zfs: Only raw volumes are supported"

This reverts commit bb5f2dc91f43f48ff726aa589bdac546738d2980.

The "if (vol->target.format != VIR_STORAGE_FILE_RAW)" check in the
createVol backend. This check is bogus because virStorageVolDefParseXML()
in conf/storage_conf.c sets target.format only if volOptions in
virStoragePoolTypeInfo has formatFromString set, and that's not the
case the zfs backend.

So the check always fails and breaks volume creation.

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