news: Document recent hook script extension
news: Document recent hook script extension

Signed-off-by: Dmitry Nesterenko <f30d55615ca95b434b0775da8c01345714045164@virtuozzo.com>
Reviewed-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

zippy2/libvirt,nertpinx/libvirt,libvirt/libvirt,nertpinx/libvirt,crobinso/libvirt,zippy2/libvirt,jardasgit/libvirt,jardasgit/libvirt,jardasgit/libvirt,olafhering/libvirt,nertpinx/libvirt,crobinso/libvirt,jfehlig/libvirt,olafhering/libvirt,zippy2/libvirt,libvirt/libvirt,jfehlig/libvirt,jardasgit/libvirt,nertpinx/libvirt,jardasgit/libvirt,olafhering/libvirt,nertpinx/libvirt,jfehlig/libvirt,zippy2/libvirt,crobinso/libvirt,olafhering/libvirt,libvirt/libvirt,crobinso/libvirt,libvirt/libvirt,jfehlig/libvirt