[patch] Add disused:route to validator

[gaben]

What steps will reproduce the problem?

1. Validate a disused:route relation. e.g. ​relation/9301679

What is the expected result?

No warning.

What happens instead?

A warning saying it's missing the route tag.

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: 2023-09-21 20:54:28 +0200 (Thu, 21 Sep 2023)
Build-Date:2023-09-22 01:30:58
Revision:18841
Relative:URL: ^/trunk

resources/data/validator/relation.mapcss

@@ -12 +12 @@
 relation[type=destination_sign][!destination],
 relation[type=enforcement][!enforcement],
 relation[type=public_transport][!public_transport],
-relation[type=route][!route],
+relation[type=route][!route][!disused:route],
 relation[type=route_master][!route_master],
 relation[type=waterway][!waterway] {
   throwWarning: tr("{0} relation without {0} tag", "{1.key}");

[GerdP]

This is confusing. Your example r5189560 also has a route=train tag.

[gaben]

:D nice catch and also thank you!