Make walls connect to nodes in a new wall_connected group

[alek13]

walls: add ability to specify group wall_connected for blocks to which the walls will be connected

[sfan5]

What's the use case here? I don't get it.

[alek13]

@sfan5 , we need ability to have walls from other blocks, then stones one or fences and connects with each other.
And on the other hand, we need to walls will be connected to node not from stones.
And also we don't want to that nodes (to which walls connects to) will be a stone and somehow took part in the recipes with group:stone. For example, default:fence have recipe with group:stone

[alek13]

@sfan5 , any chance that it will be merged ?

[alek13]

@sfan5 ?

[appgurueu]

Concept seems fine to me: You want to enable arbitrary nodes to connect to walls, without having to make them have the wall, stone or fence groups. Say, for example, maybe a door. So adding a new group for that makes sense.

But I'd like for this group (and ideally also the other groups) to be documented in game_api.txt.

[alek13]

@sfan5 / @appgurueu , add info into game_api.txt

[appgurueu]

There are a couple unrelated trailing whitespace changes and the group list is for some reason indented by 1 space but I don't care (ideally please put the trailing whitespace changes in a separate commit and dedent the list though)

[alek13]

@sfan5 / @appgurueu merge ?