Out of use? Not in my neck of the woods. I grepped a bunch of source code I have lying around, and I found it used in OpenSSL (3 times), the Postgres C driver

Out of use? Not in my neck of the woods. I grepped a bunch of source code I have lying around, and I found it used in OpenSSL (3 times), the Postgres C driver, and the Snappy compressor -- the latter because it includes a complete copy of ALICE'S ADVENTURES IN WONDERLAND!