include/mysql.h:
  read_statistic added to virtual methods
libmysql/client_settings.h:
  interface for cli_read_statistic added
libmysql/libmysql.c:
  read_statistic and mysql_stat code changes
libmysqld/lib_sql.cc:
  emb_read_statistic implemented
  server_version initialized
sql-common/client.c:
  cli_read_statistic added to the table
sql/sql_parse.cc:
  storage of result of COM_STATISTIC changed in embedded library