URL naming
----------
+### Unstable endpoints
/$LISTNAME/?r=$GIT_COMMIT -> HTML only
/$LISTNAME/index.atom.xml -> Atom feed
/$LISTNAME/all.atom.xml -> Atom feed, includes replies
+
+### Stable endpoints
/$LISTNAME/m/$MESSAGE_ID.html -> HTML content (short quotes)
/$LISTNAME/m/$MESSAGE_ID.txt -> raw original
/$LISTNAME/m/$MESSAGE_ID -> 301 to .html version
/$LISTNAME/f/$MESSAGE_ID.html -> HTML content (full quotes)
/$LISTNAME/f/$MESSAGE_ID -> 301 to .html version
/$LISTNAME/f/$MESSAGE_ID.txt -> 301 to m/$MESSAGE_ID.txt
+
+TODO (these might be expensive)
+-------------------------------
/$LISTNAME/t/$MESSAGE_ID.html -> HTML content of thread
/$LISTNAME/t/$MESSAGE_ID.mbox -> mbox content of thread