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

8048146: sjavac uses unexpected exit code of -1
Summary: Changed exit codes for sjavac
Reviewed-by: jlahoda

8147569: Error messages from sjavac server does not always get relayed back to client
Summary: Refactored how logging works in sjavac.
Reviewed-by: jlahoda

8129114: Sjavac should stream back compiler output to the client as soon as it becomes available
Summary: Protocol revised, javac output sent back to client slightly earlier.
Reviewed-by: jlahoda

8133671: langtools tests have bad license
Summary: Dropped classpath exception from copyright notice in tests.
Reviewed-by: jjg

8048318: Refactor sjavac as a thin client
Summary: Moved compilation logic from client to server.
Reviewed-by: jlahoda

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

8048457: Sjavac should not use portfiles, sockets, etc if background=false
8044131: Restructure client / server protocol code
Summary: Changes protocol code to use Object input/output streams. Avoids spawning server if background=false. Refactors idleness checks, pooling and port file monitoring.
Reviewed-by: jjg, jfranck