changelog: Add new draft/proposed specs

CHANGELOG.md

 * Added automated connection throttling! See the new `connection-throttling` section in the config.
 * Added `KLINE` and `UNKLINE` commands. Complementing `DLINE`'s per-IP and per-network bans, this lets you ban masks from the server.
 * Added `LUSERS` command (thanks @vegax87!).
+* Added draft IRCv3 capability [`draft/message-tags-0.2`](http://ircv3.net/specs/core/message-tags-3.3.html).
+* Added proposed IRCv3 capability [`draft/maxline`](https://github.com/ircv3/ircv3-specifications/pull/281).
 
 ### Changed
 * Changed casemapping from "rfc7700" to "rfc7613", to match new draft spec.
 ### Added
 * Added ability to ban IP addresses and networks from the server with the `DLINE` and `UNDLINE` commands.
 * Added alpha REST API (intended primarily for use with a future web interface to manage accounts, DLINEs, etc).
-* Added proposed IRCv3 capability [`maxline`](https://github.com/ircv3/ircv3-specifications/pull/281).
 
 ### Changed
 * Database upgraded to make handling accounts simpler.