Fix for BUG#8560: Set max_sort_char for any 8-bit charset with binary collation. max_sort_char is needed by
my_like_range_simple to produce upper bound constants for LIKE "str_%" and similar expressions.


mysql-test/r/ctype_cp1251.result:
  Test for BUG#8560
mysql-test/t/ctype_cp1251.test:
  Test for BUG#8560