[PATCH] Validator shouldn't raise warning about missing tag for informal crossing

[mtk2]

What steps will reproduce the problem?

1. Node representing the crossing of the path and the railway is tagged with only crossing=informal tag.

What is the expected result?

Validator shouldn't raise any warning/error for such node.

What happens instead?

Validator raises a warning "missing tag - pedestrian railway crossing without railway=crossing".

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

According to Wiki (​https://wiki.openstreetmap.org/wiki/Tag:crossing%3Dinformal) this tag shouldn't be used with highway=crossing because it shouldn't be expected a real crossing there. Per analogy, this rule should be applied to railway=crossing too.

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2025-02-27 18:02:18 +0100 (Thu, 27 Feb 2025)
Revision:19342
Build-Date:2025-02-28 02:30:51
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (19342 en) Linux Debian GNU/Linux 12 (bookworm)
Memory Usage: 340 MB / 3976 MB (69 MB allocated, but free)
Java version: 17.0.14+7-Debian-1deb12u1, Debian, OpenJDK 64-Bit Server VM
Look and Feel: javax.swing.plaf.metal.MetalLookAndFeel
Screen: :0.0 1920x1080x[Multi depth]@60Hz (scaling 1.00×1.00)
Maximum Screen Size: 1920×1080
Best cursor sizes: 16×16→16×16, 32×32→32×32
Environment variable LANG: en_US.utf8
System property file.encoding: UTF-8
System property sun.jnu.encoding: UTF-8
Locale info: en_US
Numbers with default locale: 1234567890 -> 1234567890
Desktop environment: GNOME
Java package: openjdk-17-jre:amd64-17.0.14+7-1~deb12u1
Java ATK Wrapper package: libatk-wrapper-java:all-0.40.0-3
libcommons-compress-java: libcommons-compress-java:all-1.22-1
fonts-noto: fonts-noto:all-20201225-1
VM arguments: [--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, -Dsun.java2d.opengl=True, -Djosm.home=<josm.pref>]
Dataset consistency test: No problems found

[mtk2]

Don't raise warning at the intersection of railway and path if node is tagged as crossing=informal