Log Message:
Changes 1.4.2:
* Undo a crash-bug introduced in 1.3.9 affecting some applications of
  the apr hash and table structures, reported to affect Subversion

Changes 1.4.1:
* Win32: Properly handle the ERROR_DIRECTORY system error code.

Changes 1.4.0:
* Add apr_global_mutex_lockfile() for retrieving the file, if any,
  associated with the mutex.  Add apr_global_mutex_name() for retrieving
  the name of the lock mechanism used by the underlying proc mutex.

* Add apr_socket_atreadeof to determine whether the receive part of the
  socket has been closed by the peer.

* Make apr_pollset and apr_pollcb implementations using providers.
  Added apr_pollset_create_ex and apr_pollcb_create_ex that allows
  choosing non-default providers.

* apr_temp_dir_get() now checks the TMPDIR environment variable first,
  instead of third.

* Add apr_file_sync() and apr_file_datasync() calls.

* apr_pollset_wakeup() on Windows: Fix core caused by closing the
  file_socket_pipe with standard file_close.

* Introduce apr_hash_do() for iterating over a hash table.

* Make sure WIN32 behaves the same as posix for file-backed shared memory
  by removing the file on cleanup/remove.

* Introduce apr_pollset_wakeup() for interrupting the blocking
  apr_pollset_poll() call.

* Add apr_file_link() function.