added some micro benchmarks (SocketChannelCompare does direct comparison)

8233081: C1: PatchingStub for field access copies too much Reviewed-by: thartmann, dlong

8232896: ZGC: Enable C2 clone intrinsic Reviewed-by: pliden, kvn

8232880: Update test documentation with additional settings for client UI tooltip tests Reviewed-by: aivanov, serb, ihse

8233574: Shenandoah: build is broken without jfr Reviewed-by: rkennke, shade

8233495: Some fieldDescriptor methods can pass existing constantPoolHandle Reviewed-by: lfoltan, coleenp

8233494: Avoid calling MallocTracker::record_malloc and record_free when NMT is off Reviewed-by: mdoerr, zgu

8233429: Minimal and zero VM build broken after JDK-8227003 Reviewed-by: iveresov, shade, thartmann Contributed-by: igor.veresov@oracle.com, fujie@loongson.cn

8233019: java.lang.Class.isPrimitive() (C1) returns wrong result if Klass* is aligned to 32bit Reviewed-by: mdoerr, dlong, aph

8233422: Extra space in the title of the HTML javadoc page Reviewed-by: ihse, erikj

8232734: [TESTBUG] avoid using JDK symbols in ExtraSymbols.symbols.txt Reviewed-by: ccheung

8232919 : If user installs msi and exe, two installations are found in Add/Remove Submitted-by: asemenyuk Reviewed-by: aherrick, almatvee

Merge

8233091: Backout JDK-8212117: Class.forName loads a class but not linked if class is not initialized Reviewed-by: alanb, dholmes, mchung