(automap) something like am_showtriggerlines applying to only doors

[EtherBot]

Currently, it's possible to colorize lines leading to doors in two ways, either using

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am_cdwallcolor

or

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am_showtriggerlines

Both of these cause things other than doors to be colorized, however. The former causes any ceiling height variations to be colorized, and the latter will highlight every triggerable line, which can be undesireable in some cases. Curiously, am_showtriggerlines 1 will highlight every trigger line excluding doors, but there's no way as far as I can tell to give trigger lines for exclusively doors a specific color. Surely theres a way to discriminate door triggerable lines from non-door ones, because that's what am_showtriggerlines 1 does. So this strikes me as relatively simple to implement, unless I'm missing something.

The use case for this is if the player wants their automap to display a unique color for lines that are doors. For instance, having only 1-sided walls, doors, locked doors, and floor height variations colorized can provide a fairly clean automap screen with only the information necessary for a player to progress without giving away potential surprises/traps like am_showtriggerlines 2 would do.