Note about bug where markdown references are used in blog posts.

apps/blagh/app.rc

@@ -78,6 +78,8 @@ fn blagh_body {
         sed '1s!.*![&]('^$l(2)^') ('^$l(1)^')!' < $p/index.md 
         echo # Needed extra \n so markdown doesn't mess up the formatting, probably can be done in sed.
     }
+    # XXX BUG! Markdown [references] break because multiple markdown documents are merged. Should format each blog post independently.
+    # TODO: use fltr_cache directly, that can fix the previous bug plus provide a perf boost by caching title generation.
     } | $formatter 
 }