ut_print_name(), ut_print_namel(): Add parameter table_id for distinguishing
names of tables from other identifiers (names of indexes, columns and
constraints).

innobase_convert_from_table_id(), innobase_convert_from_id(),
innobase_convert_from_filename(), innobase_get_charset(): New functions.

dict_accept(), dict_scan_id(), dict_scan_col(), dict_scan_table_name(),
dict_skip_word(), dict_create_foreign_constraints_low():
Add parameter "cs", so that isspace() can be replaced with my_isspace(),
whose operation depends on the connection character set.

dict_scan_id(): Convert the identifier to UTF-8.

dict_str_starts_with_keyword(): New extern function, to replace dict_accept()
in row_search_for_mysql().

mysql_get_identifier_quote_char(): Replaced with innobase_print_identifier().

ha_innobase::create(): Remove the thd->convert_string() call.
Pass the statement to InnoDB in the connection character set
and let InnoDB convert the identifiers to UTF-8.