javadoc's Analyzer crashes on JDK 16

The Analyzer from the java/javadoc module may fail with exception like:

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Caused by: java.lang.NoClassDefFoundError: com/sun/tools/doclint/HtmlTag
at org.netbeans.modules.javadoc.hints.Analyzer.visitStartElement(Analyzer.java:625)
at org.netbeans.modules.javadoc.hints.Analyzer.visitStartElement(Analyzer.java:115)
at jdk.compiler/com.sun.tools.javac.tree.DCTree$DCStartElement.accept(DCTree.java:850)
at jdk.compiler/com.sun.source.util.DocTreePathScanner.scan(DocTreePathScanner.java:76)
at org.netbeans.modules.javadoc.hints.Analyzer.scan(Analyzer.java:738)
at org.netbeans.modules.javadoc.hints.Analyzer.scan(Analyzer.java:115)
at jdk.compiler/com.sun.source.util.DocTreeScanner.scan(DocTreeScanner.java:102)
at jdk.compiler/com.sun.source.util.DocTreeScanner.scanAndReduce(DocTreeScanner.java:110)
at jdk.compiler/com.sun.source.util.DocTreeScanner.visitDocComment(DocTreeScanner.java:188)
at org.netbeans.modules.javadoc.hints.Analyzer.visitDocComment(Analyzer.java:256)
at org.netbeans.modules.javadoc.hints.Analyzer.visitDocComment(Analyzer.java:115)
at jdk.compiler/com.sun.tools.javac.tree.DCTree$DCDocComment.accept(DCTree.java:138)
at jdk.compiler/com.sun.source.util.DocTreePathScanner.scan(DocTreePathScanner.java:55)
at org.netbeans.modules.javadoc.hints.Analyzer.analyze(Analyzer.java:169)
at org.netbeans.modules.javadoc.hints.JavadocHint.errorHint(JavadocHint.java:192)
at jdk.internal.reflect.GeneratedMethodAccessor10.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.netbeans.modules.java.hints.providers.code.CodeHintProviderImpl$WorkerImpl.createErrors(CodeHintProviderImpl.java:317)

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While running on a development build of JDK 16. HtmlTag is an internal class in JDK, and was moved to a different location recently. Would be better to avoid dependency on JDK classes if we can.