8181370: Convert anonymous inner classes into lambdas/method references
Reviewed-by: jjg, rfield, mchung

8078561: Error message should be generated once when -source 6 is specified
Summary: Code to avoid duplicated errors about features not supported in the current source level moved to Log
Reviewed-by: jjg

8136930: Simplify use of module-system options by custom launchers
8160489: Multiple -Xpatch lines ignored by javac
8156998: javac should support new option -XinheritRuntimeEnvironment
Reviewed-by: jlahoda, ksrini

8162359: javac should use stdout for --help and --version
Reviewed-by: vromero

8135131: Enable thin server mode in Sjavac
Summary: State tracknig and incremental compilation disabled unless --state-dir is provided.
Reviewed-by: jlahoda

8129962: Investigate performance improvements in langtools combo tests
Summary: New combo API that runs all combo instances in a shared javac context (whenever possible).
Reviewed-by: jjg, jlahoda, vromero

8073550: java* tools: replace obj.getClass hacks with Assert.checkNonNull or Objects.requireNonNull
Summary: replace getClass() with approapriate NPE checks
Reviewed-by: jjg
Contributed-by: aleksey.shipilev@oracle.com

8066843: Messager.printMessage cannot print multiple errors for same source position
Summary: Using a DiagnosticFlag to mark diagnostics that should be always printed even if multiple of them have the same source position.
Reviewed-by: darcy, jjg, mcimadamore

8058542: Devise scheme for better diagnostic creation
Summary: Add support for generating (at build-time) an enum-like class containing all javac diagnostics, which allows for safe diagnostic creation.
Reviewed-by: jlahoda, jjg, vromero, erikj, jfranck

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