client/model/diff: add is_topo_diff
client/model/diff: add is_topo_diff

ozFri/rhizi,ozFri/rhizi,Rhizi/rhizi,tlevine/rhizi,tlevine/rhizi,cben/rhizi,cben/rhizi,Rhizi/rhizi,shlomif/rhizi,shlomif/rhizi,shlomif/rhizi,Rhizi/rhizi,tlevine/rhizi,yuvadm/rhizi,yuvadm/rhizi,yuvadm/rhizi,yuvadm/rhizi,Rhizi/rhizi,shlomif/rhizi,cben/rhizi,ozFri/rhizi,cben/rhizi,ozFri/rhizi,tlevine/rhizi