8133115: docs: replace <tt> tags (obsolete in html5) for java.util.logging, java.util.prefs, java.util.zip, java.util.jar
Reviewed-by: lancea

8073479: Replace obj.getClass hacks with Objects.requireNonNull
Reviewed-by: dfuchs, plevart, vlivanov

8054834: Modular Source Code
Reviewed-by: alanb, chegar, ihse, mduigou
Contributed-by: alan.bateman@oracle.com, alex.buckley@oracle.com, chris.hegarty@oracle.com, erik.joelsson@oracle.com, jonathan.gibbons@oracle.com, karen.kinnear@oracle.com, magnus.ihse.bursie@oracle.com, mandy.chung@oracle.com, mark.reinhold@oracle.com, paul.sandoz@oracle.com