8035473: [javadoc] Revamp the existing Doclet APIs
8146529: Update the new Doclet API
8146427: "-nohelp" option issue
8146475: "-helpfile" option issue
Reviewed-by: alanb, bpatel, ihse, jjg, jlahoda, mchung, ogb, vromero

8049422: Remove @jdk.Exported
Reviewed-by: dfuchs, mchung, darcy, chegar

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