changes in sbcl-0.9.9 relative to sbcl-0.9.8:

  * new platform: experimental support for the Windows operating
    system has been added.  (thanks to Alastair Bridgewater)
  * fixed several bugs in and robustified the PPC FFI (including
    callbacks).  (thanks to Cyrus Harmon and Heiner Schwarte)
  * bug fix: allow non-simple string symbol names (reported by Paul
    Dietz)
  * bug fix: interrupt handling on NetBSD (thanks to Richard M
    Kreuter)
  * bug fix: saving a core corrupted callbacks on x86/x86-64
  * bug fix: closed a loophole in metacircularity detection and
    grounding in the PCL implementation of CLOS.
  * bug fix: TRUENAME on "/" no longer returns a relative pathname.
    (reported by tomppa on #lisp)
  * bug fix: clear the direction flag on Lisp -> C transitions, as
    required by the x86-64 ABI. Fixes mysterious GC crashes on SuSE.
    (reported by Andrej Grozin and Hendrik Maryns)
  * optimization: major improvements to GC efficiency on GENCGC platforms
  * optimization: faster implementation of EQUAL
  * optimization: emit more efficient opcodes for some common
    immediate->register MOV instructions on x86-64.  (thanks to Lutz Euler)
  * optimization: several other minor code-generation improvements on x86-64
  * fixed segfaults on x86 FreeBSD 7-current.  (thanks to NIIMI Satoshi)