Bug system: https://bugs.openjdk.org

JDK-8330183: Add SourceVersion.RELEASE_24
JDK-8339696: Clarify modeling scope of javax.lang.model.element
JDK-8340721: Clarify special case handling of unboxedType and getWildcardType
JDK-8341483: Clarify special case handling of Types.getArrayType