Add validation for missing pylons in aerialway ways

[gaben]

What steps will reproduce the problem?

1. Draw/have a way with aerialway=* tag
2. Run the validator

What is the expected result?

A validator message about missing aerialway=pylon tags for each node.

What happens instead?

No warning.

Please provide any additional information below. Attach a screenshot if possible.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2023-08-24 17:23:11 +0200 (Thu, 24 Aug 2023)
Build-Date:2023-08-25 01:30:59
Revision:18821
Relative:URL: ^/trunk

[gaben]

There is also a ​Tag:aerialway=station in some cases. I need to dig up which should be suggested in which scenario.

[skyper]

As there might be stations in the middle, I don't think you can proper distinguish between a missing station or pylon. Every node of an aerialway has to have either aerialway=pylon or aerialway=station OR the node should be deleted.

[gaben]

That should work. A warning, suggesting to add either of those tags. What do you think?