engines when lower_case_table_names == 2, as it did previously
for InnoDB and MEMORY. (Bug #9660)


mysql-test/r/lowercase_table2.result:
  Fix results
sql/sql_table.cc:
  Add build_table_path() function to construct the path to
  a table, and use it to replace nearly all of the places
  where this was done with similar code.
  
  Fix mysql_rename_table() to not lowercase the .frm file
  name when lower_case_table_names == 2 and the storage
  engine does not set the HA_FILE_BASED flag (such as InnoDB).