[advent] Added topic for Unary sort (++lichtkind)

Author: Util

misc/perl6advent-2011/topic-brainstorming

@@ -26,6 +26,8 @@
     - ENTER/LEAVE phasers
     - Pseudo packages (MY, OUR, CORE, GLOBAL, etc.)
 - "porting" a module from one implementation to another
+- Unary sort
+    - see http://irclog.perlgeek.de/perl6/2011-12-14#i_4833227
 
 Already planned or written about:
 - Grammar::Debugger