Parallel xzcat written for virt-builder.
+
+----------------------------------------------------------------------
+
+PLEASE NOTE that I wrote this code to experiment with parallel lzma.
+The code here was eventually included in virt-builder, see:
+
+https://github.com/libguestfs/libguestfs/blob/master/builder/pxzcat-c.c
+
+If you are interested in a general purpoae parallel xz, then I
+recommend using the following project instead, which can do both
+decompression and compression:
+
+https://github.com/vasi/pixz