This is a sub-umbrella to resolve a portion of the bugs related to 4189292 as a single CCC case. The list includes:
  4310779 (spec thread) incomplete specs for java.lang.Thread.sleep(long)
  4404519 (spec thread) Thread.setDaemon should not be allowed after thread termination
  6317167 (spec thread) Make Thread.sleep javadoc fully in line with JLS 17.9
  6347010 (spec thread) Implementation detail poses hazzard for wait/notify/notifyAll usage with join
  6422556 (spec thread) ThreadLocal.remove documentation needs improvement wrt reclaiming objects