Changes 5.2.2:
* Fixed bugs in QNX-specific code.
* Omitted the use of pipe2() even if it is available to avoid
  portability issues with some old Linux and glibc combinations.
* Updated German translation.
* Added project files to build static and shared liblzma (not the
  whole XZ Utils) with Visual Studio 2013 update 2 or later.
* Documented that threaded decompression hasn't been implemented
  yet. A 5.2.0 NEWS entry describing multi-threading support had
  incorrectly said "decompression" when it should have said
  "compression".

(adam)