sql/item.cc:
  query_val_str to return param item value in string format
sql/item.h:
  Misc defination changes for Item_param
sql/sql_class.h:
  Changes for PREP_STMT
sql/sql_string.cc:
  Duplicate String::replace to take char * and length as arguments
sql/sql_yacc.yy:
  Change to take param marker position to Item_param as an argument
sql/sql_prepare.cc:
  Fix for binary + update logs
sql/sql_string.h:
  Added new replace()