Validation of highway class names not perfect

[MSiipola]

What steps will reproduce the problem?

1. Create a highway with tag "highway=un"
2. Validate the highway
3. No warning

But "highway=unclassfiedx" will generate a warning.
The first example should also create a warning.

Revision:18583
Build-Date:2022-11-01 14:35:40

Identification: JOSM/1.5 (18583 en) Windows 10 64-Bit
OS Build number: Windows 10 Home 2009 (19044)
Memory Usage: 948 MB / 4078 MB (462 MB allocated, but free)
Java version: 17.0.5+8-LTS, Azul Systems, Inc., OpenJDK 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
VM arguments: [-Djpackage.app-version=1.5.18583, --add-modules=java.scripting,java.sql,javafx.controls,javafx.media,javafx.swing,javafx.web, --add-exports=java.base/sun.security.action=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.plugins.jpeg=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.spi=ALL-UNNAMED, --add-opens=java.base/java.lang=ALL-UNNAMED, --add-opens=java.base/java.nio=ALL-UNNAMED, --add-opens=java.base/jdk.internal.loader=ALL-UNNAMED, --add-opens=java.base/jdk.internal.ref=ALL-UNNAMED, --add-opens=java.desktop/javax.imageio.spi=ALL-UNNAMED, --add-opens=java.desktop/javax.swing.text.html=ALL-UNNAMED, --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED, -Djpackage.app-path=%UserProfile%\AppData\Local\JOSM\JOSM.exe]
Program arguments: [%UserProfile%\Documents\OSM\start.jos]
Dataset consistency test: No problems found

Plugins:
+ MakeParallel (v1.1.0)
+ PicLayer (1.0.2)
+ apache-commons (36034)
+ ejml (35924)
+ geotools (36028)
+ jackson (36034)
+ jaxb (35952)
+ jts (36004)
+ log4j (36034)
+ measurement (35978)
+ merge-overlap (35893)
+ opendata (36025)
+ reltoolbox (35976)
+ reverter (36011)
+ turnlanes (36011)
+ turnrestrictions (36011)
+ utilsplugin2 (36011)

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/PublicTransport&zip=1

Last errors/warnings:
- 00000.284 W: extended font config - overriding 'filename.Myanmar_Text=mmrtext.ttf' with 'MMRTEXT.TTF'
- 00000.285 W: extended font config - overriding 'filename.Mongolian_Baiti=monbaiti.ttf' with 'MONBAITI.TTF'
- 00000.827 E: java.security.KeyStoreException: Windows-ROOT not found. Cause: java.security.NoSuchAlgorithmException: Windows-ROOT KeyStore not available
- 00009.628 W: Unable to find supported projection for layer Lantmäteriet ORTO. Using EPSG:3857.
- 00009.630 W: Unable to find supported projection for layer Lantmäteriet ORTO. Using EPSG:3857.

[skyper]

Ok, for highway=unclassfiedx I get a warning Unknown property value - Value 'unclassfiedx' for key 'highway' is unknown, maybe 'unclassified' is meant? as the value is close to unclassified.
For highway=un, I get an informal warning Presets do not contain property value - Value 'un' for key 'highway' not in presets. but informal warnings have to be enabled manually.

I do not think that we can do anything else as new values are possible and presets might not include all valid values.

[MSiipola]

Ok, about enabling informal warnings.