Two things changed:
1. Repeated queries are only stored once in the history.
2. Multiline queries are stored in a concated format in the history, 
   in addition to pieces. 
(Push approved by serg)


client/mysql.cc:
  Fix up history in readline implementation.
  1. Repeated queries are only stored once in the history.
  2. Multiline queries are stored in a concated format in the history.
  (Push approved by serg)
BitKeeper/etc/logging_ok:
  Logging to logging@openlogging.org accepted