8179413: Fix remaining minor HTML5 issues in java.base module
Reviewed-by: darcy, lancea

8176865: overridden api has a wrong since value in java.base module
Reviewed-by: alanb

8150785: (bf) Hoist slice and duplicate methods up to java.nio.Buffer
Reviewed-by: alanb, rriggs, chegar

8149469: ByteBuffer API and implementation enhancements for VarHandles
Reviewed-by: chegar, alanb

8136494: Update "@since 1.9" to "@since 9" to match java.version.specification
Reviewed-by: alanb, chegar, lancea, prr

8133459: replace <tt> tags (obsolete in html5) in java.nio docs
Reviewed-by: lancea

8065556: (bf) Buffer.position and other methods should include detail in IAE
Summary: Add messages to IAEs which have none.
Reviewed-by: alanb

8065570: (bf spec) ByteBuffer.slice() should make it clear that the initial order is BIG_ENDIAN
Summary: Refine documentation of allocate*(), wrap(), slice(), duplicate(), asReadOnlyBuffer(), and as{Type}Buffer() to explcitly state the byte order of the created buffer.
Reviewed-by: alanb

4774077: Use covariant return types in the NIO buffer hierarchy
Reviewed-by: psandoz, alanb, mr, darcy

8059840: (bb) Typo in javadoc for ByteBuffer.wrap()
Reviewed-by: dfuchs

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