8216978: Drop support for pre JDK 1.4 SocketImpl implementations Reviewed-by: chegar, alanb, dfuchs

8219202: Use Unsynchronized StringBuilder in sun.net.www.ParseUtil Reviewed-by: chegar Contributed-by: Alan Malloy <amalloy@google.com>

8222992: Shenandoah: Pre-evacuate all roots Reviewed-by: shade

8219138: Miscellaneous changes imported from jsr166 CVS 2019-05 Reviewed-by: martin

8220248: fix headings in java.util.concurrent Reviewed-by: martin, jjg

8221892: ThreadPoolExecutor: Thread.isAlive() is not equivalent to not being startable Reviewed-by: martin, dholmes

8221120: CopyOnWriteArrayList.set should always have volatile write semantics Reviewed-by: martin

8222930: ConcurrentSkipListMap.clone() shares size variable between original and clone Reviewed-by: martin, smarks Contributed-by: Adam Farley8 <adam.farley@uk.ibm.com>, Martin Buchholz <martinrb@google.com>

8223145: Replace wildcard address with loopback or local host in tests - part 1 Summary: Replaces binding to wildacard with alternative less susceptible to intermittent failure in some intermittently failing tests. Reviewed-by: chegar, msheppar

8223064: Minor cleanups in ResolvedMethodTable Reviewed-by: hseigel, coleenp