8223138: Small clean-up in loop-tree support. Summary: Rename predicate 'is_inner()' to 'is_innermost()' to be accurate. Added 'is_root()' predicate for root parent test in loop-tree. Changed definition of 'is_loop()' to always lazy-read the tail, since it should never be NULL. Cleanup of 'tail()' definition. Reviewed-by: vlivanov, neliasso

8223137: Rename predicate 'do_unroll_only()' to 'is_unroll_only()'. Reviewed-by: vlivanov

8204203: Many pkcs11 tests failed in Provider initialization, after compiler on Windows changed Summary: Build NSS 3.41 with VS2017 and also upgrade to this NSS for macosx Reviewed-by: valeriep

8217364: Custom URLStreamHandler for jrt or file protocol can override default handler Reviewed-by: redestad

8223052: Cleanup: NodeSortRecord Reviewed-by: lancea

8223254: DataOutputStream/WriteUTF.java fails due to "OutOfMemoryError: Java heap space" Reviewed-by: lancea, rriggs

8218875: Add new FileSystems.newFileSystem methods Reviewed-by: rriggs, alanb, clanger, dfuchs

8220793: (fs) No support for changing modification time of symlink Reviewed-by: alanb, rriggs

8223258: Shenandoah: SRP::process_all_roots_slow processes JvmtiExport weak oops twice Reviewed-by: rkennke

8223227: Rename acquire_tag_map() to tag_map_acquire() in jvmtiEnvBase Reviewed-by: dholmes, jcbeyler

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