+ * documentation: some slot access efficiency guidelines have been
+ added to the user manual.
+ * optimization: ASSOC-IF, ASSOC-IF-NOT, MEMBER-IF, MEMBER-IF-NOT,
+ RASSOC, RASSOC-IF, and RASSOC-IF-NOT are now equally efficient
+ as ASSOC and MEMEBER.
+ * optimization: calls to ASSOC, MEMBER, and RASSOC can be transformed
+ to more efficient EQ-comparison versions more often.
+ * optimization: enhanced derivation of DOLIST iteration variable type
+ for constant lists.
+ * optimization: constant folding of simple (LIST ...) forms as DOLIST
+ arguments.
+ * optimization: runtime lookup of function definitions can be
+ elided in more cases, eg: (let ((x 'foo)) (funcall foo)).
+ * optimization: compiler is able to derive the return type of
+ (AREF (THE STRING X) Y) as being CHARACTER.
+ * optimization: CLRHASH on empty hash-tables no longer does pointless
+ work. (thanks to Alec Berryman)
+ * optimization: REPLACE deftransforms don't punt when :START1 or
+ :START2 is given
+ * bug fix: compiling DESTRUCTURING-BIND on constant list arguments
+ no longer emits a code deletion note. (reported by Andrew
+ Gasparovic)
+ * bug fix: bogus odd-number-of-keywords STYLE-WARNINGs from calls to
+ functions with an odd number of &OPTIONAL arguments, a &REST
+ argument, and one or more &KEY arguments at the call site.
+ * bug fix: STYLE-WARNINGs for functions with both &OPTIONAL and &KEY
+ arguments appeared at call sites as well.
+ * bug fix: fixed #425; CLOSE drops input buffers from streams, so
+ READ-LINE &co can no longer read from them afterwards. (reported
+ by Damien Cassou)