Remove old TODO file, using trac tickets instead

- #2104 (Check: Bytes sent and time listening might be broken?)
- #2105 (Make config option (-c) optional?)
- #2106 (Pull vorbis comments (metadata) and send to stats)
- #2107 (Provide a way for YP Dirs to check streams)
- #1944 (Rework STATS interface)
- W3C Extended Logging was never requested by someone
- Sending intros is already possible
- #2108 (Registrable URL handlers in connection.c instead of hardcoded list)
- #2109 (Abstract admin functionality to set of commands and handlers)
- #2110 (Timer-based functionalities should use single timer thread)
- #2111 (Race condition in fserv.c?)
- #2112 (Locks on avl client_trees needed?)

TODO

-BUGS
-----
-- logging - bytes send and time listening may both be broken?
-
-FEATURES
---------
-
-- Should icecast automatically (i.e. without needing -c) look for the config
-  file in /etc/icecast.xml or something?
-
-- pull out vorbis comments.  and send to stats. This seems to be being
-  done, but it isn't working right.
-
-- directory server GUID checks
-	directory server does GET /GUID-asldjfasldfjalsdkfjasldkfj HTTP/1.0
-	and either gets a 404 if it's wrong, or a 200 if it's correct.
-
-- adding new stats type, event.  events don't modify the global stats tree,
-	ie, source /1234.ogg disconnected
-
-- support W3C Extended Logging (http://www.w3.org/TR/WD-logfile.html)
-	toggle between this and Apache Combined Log Format in the config file.
-	default to apache style.
-
-- allow using get_predata() stuff to send an "intro" to any newly-connected
-  user?
-
-- general registerable url-handlers in connection.c rather than hard-coded list
-  (already getting unmaintainable)
-
-- httpp - split out query string for further processing
-
-- abstract all admin functionality to a set of commands, and command handlers.
-  Make /admin/* just parse according to a set of rules, and dispatch generic
-  commands through that.
-  Use this for alternative admin interfaces (GUI? telnet interface?)
-
-- all timer-based functionality (yp updates, slave/relay checks) should have a
-  single timer thread which dispatches events through the normal event
-  mechanism (to worker threads from the main pool). This will reduce the
-  extraneous thread count.
-
-- race condition between avl_tree_unlock(pending_tree) and 
-  thread_cond_wait(&fserv_cond) in fserv.c, it's a pain to fix but should be.
-
-- do we need to use locks on the avl client_trees in source.c and fserv.c? 
-
-  
-