bzr push into mysql-trunk branch (sergey.vojtovich:4681 to 4682)

[Sergey Vojtovich]

 4682 Sergey Vojtovich	2012-10-09 [merge]
      Null merge.

 4681 Nirbhay Choubey	2012-10-09
      Bug#14554568: CTRL-C BEHAVIOR VIOLATES PRINCIPLE OF
                    LEAST ASTONISHMENT
      
      MySQL client's current behaviour was to kill the last
      query on receipt of SIGINT (Ctrl + C). In case no query
      was found to be executing, the process itself would
      be terminated.
      
      Going with the POLA, now, 'Ctrl + C' will send a 'KILL
      QUERY' to the server if a query is found to be executing.
      This, however can be avoided by using --sigint-ignore
      option.
      
      'Ctrl + C' would now also cause the current line to
      terminate similar to \c command (invariable to the use
      of --sigint-ignore option). Lines, thus cancelled, would
      not make into client's history.
      
      'Ctrl + D' on *NIX systems would work as it did (EOF), to
      terminate the client when entered as the very first character
      on the prompt. However, with this patch the client would show
      same behaviour on Windows when 'Ctrl + Z' is used.

    modified:
      client/mysql.cc
      cmd-line-utils/libedit/read.c
      include/my_sys.h
      mysys/my_conio.c
No bundle (reason: useless for push emails).