Add TODO item to make everything use mark_for_close; not doing so will now skew the stats

svn:r1312

doc/TODO

@@ -80,6 +80,8 @@ Short-term:
         X remove per-connection rate limiting
         - Make it harder to circumvent bandwidth caps: look at number of bytes
           sent across sockets, not number sent inside TLS stream.
+        - Audit users of connnection_remove and connection_free outside of
+          main.c; many should use mark_for_close instead.
 
 On-going
         . Better comments for functions!