spurious warning when unpacking dependencies on windows.

[INFO] --- maven-plugin-plugin:3.7.0:descriptor (mojo-descriptor) @ maven-hpi-plugin ---
[ERROR]

Artifact Ids of the format maven-___-plugin are reserved for
plugins in the Group Id org.apache.maven.plugins
Please change your artifactId to the format ___-maven-plugin
In the future this error will break the build.


[INFO] Using 'UTF-8' encoding to read mojo source files.
[WARNING] Archive entry 'META-INF/MANIFEST.MF' and existing file 'C:\workarea\source\github\jenkinsci\maven-hpi-plugin\target\maven-plugin-plugin-sources\org.eclipse.jetty\jetty-maven-plugin\10.0.13\sources\META-INF\MANIFEST.MF' names differ only by case. This may lead to an unexpected outcome on case-insensitive filesystems.
[WARNING] Archive entry 'org/eclipse/' and existing file 'C:\workarea\source\github\jenkinsci\maven-hpi-plugin\target\maven-plugin-plugin-sources\org.eclipse.jetty\jetty-maven-plugin\10.0.13\sources\org\eclipse' names differ only by case. This may lead to an unexpected outcome on case-insensitive filesystems.
[WARNING] Archive entry 'org/eclipse/jetty/' and existing file 'C:\workarea\source\github\jenkinsci\maven-hpi-plugin\target\maven-plugin-plugin-sources\org.eclipse.jetty\jetty-maven-plugin\10.0.13\sources\org\eclipse\jetty' names differ only by case. This may lead to an unexpected outcome on case-insensitive filesystems.
[WARNING] Archive entry 'org/eclipse/jetty/maven/' and existing file 'C:\workarea\source\github\jenkinsci\maven-hpi-plugin\target\maven-plugin-plugin-sources\org.eclipse.jetty\jetty-maven-plugin\10.0.13\sources\org\eclipse\jetty\maven' names differ only by case. This may lead to an unexpected outcome on case-insensitive filesystems.
[WARNING] Archive entry 'org/eclipse/jetty/maven/plugin/' and existing file 'C:\workarea\source\github\jenkinsci\maven-hpi-plugin\target\maven-plugin-plugin-sources\org.eclipse.jetty\jetty-maven-plugin\10.0.13\sources\org\eclipse\jetty\maven\plugin' names differ only by case. This may lead to an unexpected outcome on case-insensitive filesystems.
[WARNING] Archive entry 'org/eclipse/jetty/maven/plugin/utils/' and existing file 'C:\workarea\source\github\jenkinsci\maven-hpi-plugin\target\maven-plugin-plugin-sources\org.eclipse.jetty\jetty-maven-plugin\10.0.13\sources\org\eclipse\jetty\maven\plugin\utils' names differ only by case. This may lead to an unexpected outcome on case-insensitive filesystems.
[WARNING] Archive entry 'org/eclipse/jetty/jetty_maven_plugin/' and existing file 'C:\workarea\source\github\jenkinsci\maven-hpi-plugin\target\maven-plugin-plugin-sources\org.eclipse.jetty\jetty-maven-plugin\10.0.13\sources\org\eclipse\jetty\jetty_maven_plugin' names differ only by case. This may lead to an unexpected outcome on case-insensitive filesystems.
[WARNING] Archive entry 'META-INF/services/' and existing file 'C:\workarea\source\github\jenkinsci\maven-hpi-plugin\target\maven-plugin-plugin-sources\org.eclipse.jetty\jetty-maven-plugin\10.0.13\sources\META-INF\services' names differ only by case. This may lead to an unexpected outcome on case-insensitive filesystems.

      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-plugin-plugin</artifactId>
        <version>${maven-plugin-tools.version}</version>
        <configuration>
          <goalPrefix>hpi</goalPrefix>
          <extractors>java-annotations</extractors>
          <mojoDependencies>org.eclipse.jetty:jetty-maven-plugin</mojoDependencies>
        </configuration>
        <executions>
          <execution>
            <id>help-goal</id>
            <goals>
              <goal>helpmojo</goal>
            </goals>
          </execution>
          <execution>
            <id>mojo-descriptor</id>
            <goals>
              <goal>descriptor</goal>
            </goals>
          </execution>
        </executions>
        <dependencies>
          <dependency>
            <groupId>org.codehaus.plexus</groupId>
            <artifactId>plexus-archiver</artifactId>
            <version>4.6.1</version>
          </dependency>
        </dependencies>
      </plugin>