minor, use vtx-id -> name mapping for the alias list instead of another namespace

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
minor, treat vtxkey space as aka-list even for the very first entry

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
minor, upon rem_vertex() traverse the alias list and unput_vertex() every alias

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'core/rotz' into next

* core/rotz:
  minor, upon rem_vertex() traverse the alias list and unput_vertex() every alias
  minor, treat vtxkey space as aka-list even for the very first entry
  minor, use vtx-id -> name mapping for the alias list instead of another namespace