[patch] Warn about turning_circle with barrier

[Famlam]

What steps will reproduce the problem?

1. Validate a turning circle with a barrier (few hundred cases worldwide). Example: ​https://www.openstreetmap.org/node/477022939

What is the expected result?

Warning: if there's a barrier in the middle of the turning_circle, it's a turning_loop; more likely the barrier is directly after leaving the circle and not on the circle, in which case they should be mapped separately.

What happens instead?

No warning

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

Patch: add the following in combinations.mapcss

node[highway=turning_circle][barrier] {
        throwWarning: tr("{0} together with {1}", "{0.tag}", "{1.key}");
        group: tr("suspicious tag combination");
}

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2021-11-01 23:05:46 +0100 (Mon, 01 Nov 2021)
Build-Date:2021-11-01 22:25:18
Revision:18303
Relative:URL: ^/trunk

Identification: JOSM/1.5 (18303 nl) Windows 10 64-Bit
OS Build number: Windows 10 Home 2009 (19044)
Memory Usage: 533 MB / 1820 MB (166 MB allocated, but free)
Java version: 1.8.0_311-b11, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Look and Feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
Screen: \Display0 1920×1080 (scaling 1.00×1.00)
Maximum Screen Size: 1920×1080
Best cursor sizes: 16×16→32×32, 32×32→32×32
System property file.encoding: Cp1252
System property sun.jnu.encoding: Cp1252
Locale info: nl_NL
Numbers with default locale: 1234567890 -> 1234567890

Plugins:
+ OpeningHoursEditor (35640)
+ SimplifyArea (35640)
+ imagery_offset_db (35640)
+ pt_assistant (1ff2e15)
+ reverter (35869)
+ tageditor (35640)
+ turnlanes-tagging (288)
+ undelete (35848)
+ utilsplugin2 (35856)

Tagging presets:
+ http://mijndev.openstreetmap.nl/~allroads/JOSM/Presets/NL-Fiets.zip

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
+ %UserProfile%\Documents\tijdelijke bestanden\josm-eigen.mappaint.mapcss
+ https://josm.openstreetmap.de/josmfile?page=Styles/Sidewalks&zip=1

Validator rules:
+ %UserProfile%\Documents\tijdelijke bestanden\josm-eigen.validator.mapcss

Last errors/warnings:
- 00012.752 E: Lokaliseren van afbeelding 'bus.png' mislukt