Functional:
  - items from meeting with Erik O, Robbin, Jesper and Mary:
    - backout HandshakeAfterDeflateIdleMonitors option and always do a
      handshake after deflation
    - backout C2 ref_count changes since handshake after deflation
      closes the race

  - items from the hunt for 8230249:
    - backout marking the ObjectMonitor::_header field
    - log when cas_set_mark() in install_displaced_markword_in_object()
      fails due to a race
    - call try_set_owner_from(DEFLATER_MARKER, NULL) as needed to clear
      the owner field

Test update:
  - backout workaround in test/jdk/java/rmi/server/UnicastRemoteObject/
    unexportObject/UnexportLeak.java since ServiceThread deflation
    should solve that problem

Cleanup:
  - rename set_om_ptr_if_safe() to save_om_ptr_if_safe()
  - delete unused ref_count_offset_in_bytes()
  - fix pad size error in print_debug_style_on(()
  - reformat some code with really long lines
  - clarify comments
  - copyright year changes (a new year has arrived!)