Lintian tag information: package-contains-readme-for-other-platform-or-distro (type: warning)

Description (from lintian-explain-tags)

package contains a README.(platform) file that contains instructions
specific to a platform or distribution other than Debian and thus can most
likely be removed. If it contains information that pertains to Debian,
please consider renaming it, or including it in an already existing README
file.

Visibility: warning
Show-Always: no
Check: documentation

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