names to lower case using latin1 instead of utf-8 in sql_acl.cc if lower_case_table_names 
was on. Also replaced in other such places system_charset_info with files_charset_info
for consistency.


sql/handler.cc:
  Replaced system_charset_info with files_charset_info in places where we are converting 
  names to lower case because of lower_case_table_names for consistency.
sql/sql_acl.cc:
  We should use files_charset_info when converting db/table names to lower case because they
  could be in utf-8 and not in latin1!
sql/sql_cache.cc:
  Added clarifying comments in tricky place after discussion with Sanja.
  Replaced system_charset_info with files_charset_info in places where we 
  are converting names to lower case because of lower_case_table_names for 
  consistency.
sql/sql_db.cc:
  Replaced system_charset_info with files_charset_info in places where we are converting 
  names to lower case because of lower_case_table_names for consistency.
sql/sql_show.cc:
  Replaced system_charset_info with files_charset_info in places where we are converting 
  names to lower case because of lower_case_table_names for consistency.
sql/sql_table.cc:
  Replaced system_charset_info with files_charset_info in places where we are converting 
  names to lower case because of lower_case_table_names for consistency.