7071826: Avoid benign race condition in initialization of UUID Summary: Avoids mostly benign but sometimes expensive race condition on initialization of UUID.numberGenerator which is used by UUID.randomUUID() Reviewed-by: alanb, chegar

7167359: (tz) SEGV on solaris if TZ variable not set Reviewed-by: okutsu

7163874: InetAddress.isReachable should support pinging 0.0.0.0 Reviewed-by: alanb, chegar

Merge