+ Simplified cache logic in drupal_get_path_map().
 + Added check to see if errors should be reported to error_handler().
 + Use proper db_query() syntax in throttle(), and use $_ENV instead of
   getenv().
 + Changed fix_gpc_magic() to use array_walk (C functions will always be
   faster), and renamed _fix_gpc_magic_array() to _fix_gpc_magic().
 + Renamed $node in array2object() to $array.
 + Renamed $node in object2array() to $object.
 + Minor other coding method tweaks.