+changes relative to sbcl-1.1.12:
+ * optimization: better distribution of SXHASH over small conses of related
+ values. (lp#309443)
+ * other improvements to SXHASH:
+ ** use the whole of the positive-fixnum range for SXHASH of fixnums
+
+changes in sbcl-1.1.12 relative to sbcl-1.1.11: