Some reoganization
  Fixed that binary arguments do not affect result charset
  anymore
  For example, the second argument doesn't affect charset of result in LEFT(string,10)
sql_string.h:
  Strings are binary by default now


sql/sql_string.h:
  Strings are binary by default now
sql/item_func.cc:
  Some reoganization
  Fixed that binary arguments do not affect result charset
  anymore
  For example, the second argument doesn't affect charset of result in LEFT(string,10)