fix non existing anymore informations (#467)

Signed-off-by: Olivier Lamy <olamy@apache.org>

Author: olamy

src/main/java/org/apache/maven/plugins/jar/AbstractJarMojo.java

@@ -114,8 +114,8 @@ public abstract class AbstractJarMojo extends AbstractMojo {
     private MavenArchiveConfiguration archive = new MavenArchiveConfiguration();
 
     /**
-     * Using this property will fail your build cause it has been removed from the plugin configuration. See the
-     * <a href="https://maven.apache.org/plugins/maven-jar-plugin/">Major Version Upgrade to version 3.0.0</a> for the
+     * Using this property will fail your build cause it has been removed from the plugin configuration. See the menu entry
+     * <a href="https://maven.apache.org/plugins/maven-jar-plugin/">Using Your Own Manifest File</a> for the
      * plugin.
      *
      * @deprecated For version 3.0.0 this parameter is only defined here to break the build if you use it!
@@ -335,7 +335,7 @@ public void execute() throws MojoExecutionException {
         if (useDefaultManifestFile) {
             throw new MojoExecutionException("You are using 'useDefaultManifestFile' which has been removed"
                     + " from the maven-jar-plugin. "
-                    + "Please see the >>Major Version Upgrade to version 3.0.0<< on the plugin site.");
+                    + "Please see the link >>Using Your Own Manifest File<< on the plugin site.");
         }
 
         if (skipIfEmpty