8162546: change hidden options -Xdebug to --debug, -XshouldStop to --should-stop, and -diags to --diags
Reviewed-by: mcimadamore

8153407: javac, fold debug options
Reviewed-by: mcimadamore, jjg

8142968: Module System implementation
Summary: Initial integration of JEP 200, JEP 260, JEP 261, and JEP 282
Reviewed-by: jjg, jlahoda, vromero, mcimadamore, bpatel, ksrini, darcy, anazarov, dfuchs
Contributed-by: alan.bateman@oracle.com, alex.buckley@oracle.com, jonathan.gibbons@oracle.com, karen.kinnear@oracle.com, mandy.chung@oracle.com, mark.reinhold@oracle.com, jan.lahoda@oracle.com, vicente.romero@oracle.com, andreas.lundblad@oracle.com, andrey.x.nazarov@oracle.com, chris.hegarty@oracle.com, erik.joelsson@oracle.com, kumar.x.srinivasan@oracle.com, sundararajan.athijegannathan@oracle.com

8076543: Add @modules as needed to the langtools tests
Reviewed-by: jjg, shurailine

8016281: The SAM method should be passed to the metafactory as a MethodType not a MethodHandle
8020010: Move lambda bridge creation from metafactory and VM to compiler
Summary: langtools/javac component of the bridge support and MethodType vs. MethodHandle changes.
Reviewed-by: jjg, vromero, briangoetz, forax
Contributed-by: robert.field@oracle.com