Some of these are genuine bugs with objects bigger than 2GB, but
my system doesn't allow me to write tests for it.

encoding and surrogateescape error handler. Patch written by David Watson.

Reindent also posix_getlogin(), and fix a typo in the NEWS file.

encoding and surrogateescape error handler. Patch written by David Watson.

using the filesystem encoding and surrogateescape error handler. Patch
written by David Watson.

Store builtins in cell variables to speed-up the common path,
reducing the chance of a lock needing to block at all.

Call _wfopen() on Windows, or fopen() otherwise. Return the new file object on
success, or NULL if the file cannot be open or (if PyErr_Occurred()) on unicode
error.