Class finalization protocol: broken hyperlink to MAKE-INSTANCES-OBSOLETE

[phoe]

http://metamodular.com/CLOS-MOP/class-finalization-protocol.html

This website links to http://metamodular.com/CLOS-MOP/make-instances-obsolete.html which gives 404.

[phoe]

Fix: http://clhs.lisp.se/Body/f_mk_i_1.htm