changes in sbcl-1.3.17 relative to sbcl-1.3.16:
  * enhancement: memory overhead from the garbage collector's metadata
    is reduced on 64-bit architectures; no change for 32-bit.
  * enhancement: further garbage collector speedups affecting
    pinned objects on conservative backends, and simple-vectors.
  * enhancement: on Linux a custom handler for SIGSEGV can be called
    for page faults outside of dynamic space by changing the C symbol
    "sbcl_fallback_sigsegv_handler".
  * bug fix: sb-cover does not lose source positions for AND/OR/COND.
  * bug fix: random disassembler failures. (lp#1527931)
  * The bundled sb-md5 contrib has been updated to release 2.0.4
    which is licensed under Creative Commons CC0 per author's statement
    https://github.com/pmai/md5/commit/fd134e71b71a10ab78905833a7cb9d4d6817c589
    (Refer to NEWS and COPYING in the contrib/sb-md5 subdirectory)