changes in sbcl-0.9.2 relative to sbcl-0.9.1:

  * numerous signal handling fixes to increase stability
  * Support for EUC-JP external format.  (thanks to NIIMI Satoshi)
  * minor incompatible change: we now correctly canonize default
    initargs, making them be a list of (INITARG INITFORM INITFUNCTION)
    as per the MOP, rather than the historical (INITARG INITFUNCTION
    INITFORM).  (reported by Bruno Haible)
  * new feature: WITH-COMPILATION-UNIT now accepts a non-standard
    :SOURCE-PLIST option. See (DOCUMENTATION #'WITH-COMPILATION-UNIT T)
    for more information.
  * TRUENAME and PROBE-FILE now correctly resolve symlinks even if the
    pathname is a directory pathname.
  * SB-SPROF now works (more) reliably on non-GENCGC platforms.
  * dynamic space size on PPC has been increased to 768Mb. (thanks to
    Cyrus Harmon)
  * SB-MOP:ENSURE-CLASS-USING-CLASS now accepts a class as the
    :METACLASS argument in addition to a class name.  (reported by
    Bruno Haible for CMUCL, patch for CMUCL by Gerd Moellmann)
  * RESTART-CASE can now be wrapped around CALL-METHOD forms.
    (reported by Bruno Haible; patch from Gerd Moellmann)
  * bug fix: sbcl runtime can now be compiled with gcc4 (thanks to
    Sascha Wilde)
  * bug fix: more cleanups to the floating point exception handling on
    x86-64 (thanks to James Knight)
  * bug fix: the compiler does not try to constant fold calls of
    COERCE and BIT-* functions when they return freshly constructed
    objects. (reported by Nikodemus Siivola and Paul Dietz)
  * optimization: improved the MIPS versions of generic (in the
    generic sense) arithmetic routines.  (thanks to Thiemo Seufer)
  * optimization: direct conversion of (unsigned-byte 32) to floats on
    the PowerPC platform.
  * optimization: structure instances with raw slots now use less
    memory, and probably show better memory locality.  (thanks to
    David Lichteblau)
  * optimization: DYNAMIC-EXTENT declarations for lists and closures
    are treated as requests for stack allocation on the x86-64,
    Alpha-32, PPC and SPARC platforms.
  * contrib improvement: it's harder to cause SOCKET-CLOSE to close()
    the wrong file descriptor; implementation of SOCKET-OPEN-P.
    (thanks to Tony Martinez)
  * threads
    ** gcing a dead thread can no longer lead to lockups
    ** threads block signals until they are set up properly
    ** errno is no longer shared by threads
    ** interrupt-thread restores the eflags register on x86
    ** fixed some lockups due to gc/thread interaction
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** invalid dotted lists no longer raise a read error when
       *READ-SUPPRESS* is T
    ** signal an error if a symbol that names a declaration is used
       as the name of a type, or vice versa
    ** allow using the (declare (typespec var*)) abbreviation for
       (declare (type typespec var*)) with all type specifiers
    ** circularity detection works properly with PPRINT-LOGICAL-BLOCK
    ** always return NIL from PPRINT-POP when OBJECT is NIL
    ** don't signal errors when pretty-printing malformed LABELS,
       FLET or MACROLET forms
    ** declarations in a DOLIST body are also in scope for the
       DOLIST return-form
    ** COMPILE-FILE accepts all pathname designators as INPUT-FILE
       and OUTPUT-FILE
    ** the ELEMENT-TYPE keyword argument to WITH-OUTPUT-STREAM is
       always evaluated