+changes in sbcl-0.9.15 relative to sbcl-0.9.14:
+ * added support for the ucs-2 external format. (contributed by Ivan
+ Boldyrev)
+ * minor incompatible change: pretty printing of objects of type
+ (cons symbol) is, in the default pprint-dispatch-table, now
+ sensitive to whether the symbol satisfies FBOUNDP. (thanks to
+ Marcus Pearce)
+ * minor incompatible change: SB-MOP:FINALIZE-INHERITANCE is now
+ called later in a class's lifetime, possibly as late as when the
+ first instance of the class is created. Previously,
+ SB-MOP:FINALIZE-INHERITANCE was called by the system as soon as a
+ class became finalizeable.
+ * fixed bug: FILE-POSITION sometimes returned inconsistent results
+ for multibyte external-format streams. (thanks to "vbzoli")
+ * fixed bug: CHANGE-CLASS would fail to preserve the values of slots
+ with :ALLOCATION :CLASS inherited from superclasses of the
+ original class.
+ * fixed bug: anonymous classes can now be created using the :NAME
+ initarg and MAKE-INSTANCE / REINITIALIZE-INSTANCE, as specified by
+ AMOP. (reported by Leonid Slobodov on comp.lang.lisp)
+ * fixed bug: core-files saved with :EXECUTABLE T can again be
+ executed when SBCL_HOME isn't set. (reported by James Knight)
+ * fixed bug: toplevel LOCALLY forms with declarations could
+ occasionally get miscompiled. (reported by Yaroslav Kavenchuk)
+ * fixed bug: printing from several different threads using different
+ values of *print-case* could cause invalid output, due to
+ some internal special variables of the printer not being bound
+ thread-locally (reported by Max Mikhanosha)
+ * fixed bug: SPECIALIZER metaobjects (including anonymous classes
+ and EQL-SPECIALIZERs) can be used as specializers to DEFMETHOD.
+ (reported by Pascal Costanza)
+ * fixed bug: FINALIZE-INHERITANCE is called from
+ REINITIALIZE-INSTANCE on classes when the class has previously
+ been finalized, as required by AMOP.
+ * minor code generation optimizations:
+ ** better register allocation in CLOS dispatching functions
+ ** overflow detection when coercing signed bytes to fixnums on x86-64
+ ** is now implemented with one IMUL instruction instead of three shifts
+ ** more efficient bit-vector access on x86 and x86-64
+ ** more efficient access to raw structure slots on x86 and x86-64
+ * fixed some bugs revealed by Paul Dietz' test suite:
+ ** ENSURE-DIRECTORIES-EXIST.8: ENSURE-DIRECTORIES-EXIST must
+ return its argument.
+