* bug fix: signals delivered to threads started from foreign land (read:
directly by pthread_create, not by MAKE-THREAD) are redirected to a Lisp
thread by blocking all signals and resignalling.
+ * bug fix: SHARED-INITIALIZE initialized unbound :ALLOCATION :CLASS slots
+ from :INITFORM, if any.
changes in sbcl-1.0.28 relative to 1.0.27:
* a number of bugs in cross-compilation have been fixed, with the ultimate