8160348: jlink should use System.out for usage messages Reviewed-by: sundar

8157936: Files.size(Path p) returns 0 if path is from JrtFileSystem with exploded build Reviewed-by: psandoz

8160278: Remove java/time/test/java/time/TestClock_System from the problem list Reviewed-by: darcy

8153238: Improve test/tools/jlink/JLinkTest.java not to hard code the number of plugins Reviewed-by: jlaskey

8150173: JAXBContext.newInstance causes PrivilegedActionException when createContext's declared in abstract class extended by discovered JAXB implementation Summary: trivial fix - the concrete class must be instantiated, not the class that defines the createContext method. Reviewed-by: lancea, mchung

8147794: Jlink's ModuleEntry.stream can't be consumed more than once and ModuleEntry content should be read only if needed Reviewed-by: jlaskey, psandoz

8159172: Update usage of jlink/jimage/jmod to show option patterns Reviewed-by: mchung, alanb

8158690: GET request via HTTP/2 has a huge delays due to Nagle’s Algorithm and Delayed ACK clash Reviewed-by: chegar

8154017: Shutdown hooks are racing against shutdown sequence, if System.exit()-calling thread is interrupted Reviewed-by: alanb, dholmes, shade

8146393: sun/security/tools/jarsigner/ts.sh failed on OEL Linux 7 with ar_SA Locale Reviewed-by: weijun Contributed-by: Tim Du <tiantian.du@oracle.com>