Non valid warnings from validator about detour roles

[MSiipola]

What steps will reproduce the problem?

1. Create a road route relation with: route=detour
2. On road member segments set role=forward
3. Execute JOSM validator

What is the expected result?

No warnings

What happens instead?

Warning on each road segment which have a "forward" role

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: 2021-08-02 19:44:04 +0200 (Mon, 02 Aug 2021)
Build-Date:2021-08-02 18:26:20
Revision:18118
Relative:URL: ^/trunk

Identification: JOSM/1.5 (18118 en) Windows 10 64-Bit
OS Build number: Windows 10 Home 2009 (19042)
Memory Usage: 740 MB / 1820 MB (221 MB allocated, but free)
Java version: 1.8.0_301-b09, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Look and Feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
Screen: \Display0 2560×1440 (scaling 1.00×1.00)
Maximum Screen Size: 2560×1440
Best cursor sizes: 16×16→32×32, 32×32→32×32
System property file.encoding: Cp1252
System property sun.jnu.encoding: Cp1252
Locale info: en_SE
Numbers with default locale: 1234567890 -> 1234567890
Program arguments: [%UserProfile%\Documents\OSM\start.jos]
Dataset consistency test: No problems found

Plugins:
+ PicLayer (1.0.1)
+ apache-commons (35524)
+ ejml (35458)
+ geotools (35458)
+ imagery_offset_db (35640)
+ jaxb (35543)
+ jts (35458)
+ measurement (35640)
+ merge-overlap (35640)
+ opendata (35803)
+ reltoolbox (35640)
+ reverter (35732)
+ turnrestrictions (35640)
+ utilsplugin2 (35792)

Last errors/warnings:
- 00011.205 E: Unsupported savable layer type: TMSLayer
- 00011.227 E: Unsupported savable layer type: WMSLayer
- 00011.232 E: Unsupported savable layer type: WMTSLayer

[skyper]

The numbers (~ 4000) are not that high. There is no proposal and no word about roles on the wiki: ​Tag:route=detour

Additionally, to for-/backward for the ways I find start plus end on nodes. fork has only little use and for guidepost sign is probably better as at least in Germany, these are destination or simple road signs but no information=guidepost like the one in bicycle or hiking routes. Annoyingly, taginfo groups all type=route, so I do not get much information about detour routes from there (​relations/route#roles).

If we come up with a proper list and document it on the wiki. Adjusting the preset is no big deal.