(continue)
added event_conn_closed
replaced WaitForSingleObject on WaitForMultipleObjects
inserted a check in vio_close()
added SetEvent() for event_conn_closed



include/violite.h:
  added event_conn_closed
sql-common/client.c:
  added event_conn_closed
sql/mysqld.cc:
  added event_conn_closed
vio/vio.c:
  added event_conn_closed
vio/viosocket.c:
  replaced WaitForSingleObject on WaitForMultipleObjects
  inserted a check in vio_close()
  added SetEvent() for event_conn_closed