+ * optimization: REPLACE, SUBSEQ, and COPY-SEQ are now optimized in
+ more cases.
+ * optimization: STRING-{EQUAL,LESSP,GREATER-P} and their NOT-
+ variants no longer cons.
+ * optimization: Direct calls to CHAR-{EQUAL,LESSP,GREATERP} and
+ their NOT- variants no longer cons.
+ * enhancement: XREF information is now collected to references made
+ to global variables using SYMBOL-VALUE and a constant argument.
+ * enhancement: SIGINT now causes a specific condition
+ SB-SYS:INTERACTIVE-INTERRUPT to be signalled.
+ * bug fix: bad type declaration in the CLOS implementation has
+ been fixed. (reported by James Anderson)
+ * bug fix: incorrect ROOM reporting on x86-64 has been fixed.
+ (thanks to Lutz Euler)
+ * bug fix: DEFSETF now allows &ENVIRONMENT and disallows &AUX as
+ required by the CLHS. (reported by Samium Gromoff)
+ * bug fix: dead unbound variable references now signal an error.
+ (reported by Marco Monteiro)
+ * bug fix: / with an unused value was being deleted in safe code.
+ (thanks to Marco Monteiro and Kevin Reid)