changes in sbcl-1.0.7 relative to sbcl-1.0.6:

  * MOP improvement: support for user-defined subclasses of
    SB-MOP:SPECIALIZER has been enhanced.  The experimental interface
    function SB-PCL:MAKE-METHOD-SPECIALIZERS-FORM, called as part of
    the expansion of DEFMETHOD, is responsible for generating a form
    which creates a list of specializers when evaluated.  Additional
    functions SB-PCL:[UN]PARSE-SPECIALIZER-USING-CLASS provide
    debugging and introspective support.
  * minor incompatible change: the (unsupported) spinlock interface
    has changed: free spinlock now has the value NIL, and a held spinlock
    has the owning thread as its value.
  * enhancement: WITHOUT-INTERRUPTS now binds ALLOW-WITH-INTERRUPTS and
    WITH-LOCAL-INTERRUPTS as local macros. Refer to documentation string
    for details.
  * enhancement: name of a socket-stream is now "a socket" instead of
    "a constant string".
  * enhancement: SB-POSIX now supports lockf(). (Thanks to Zach Beane.)
  * enhancement: SB-POSIX now supports getcwd(). (Thanks to Tassilo Horn.)
  * enhancement: SB-INTROSPECT:FUNCTION-ARGLIST shows nicer argument lists
    for generic functions. (Thanks to Tobias C. Rittweiler)
  * optimization: bignum printing speed has been improved by 20-40%
    (depending on the bignum size.)
  * bug fix: WITH-MUTEX and WITH-RECURSIVE-LOCK are now interrupt safe
    on Linux.
  * bug fix: the cache used by the CLOS to store precomputed effective
    methods, slot offsets, and constant return values is now thread and
    interrupt safe.
  * bug fix: generic function dispatch function updating is now thread
    and interrupt safe (in the sense that the known issues have been
    fixed.)
  * bug fix: ADD/REMOVE-METHOD is now thread and interrupt safe.
  * bug fix: interning EQL-specializers is now thread and interrupt safe.
  * bug fix: asdf systems with dependencies to the SB-POSIX or
    SB-BSD-SOCKETS contribs can be loaded with :FORCE T.
  * bug fix: interrupt safety of applicable method computation has been
    improved.