Update changelog

Author: joepio

CHANGELOG.md

@@ -6,6 +6,10 @@ Changes to JS assets are not included here, but in [`atomic-data-browser`'s CHAN
 
 ## UNRELEASED
 
+- Add multi-tenancy support. Users can create their own `Drives` on subdomains. #288
+- Add `/register` Endpoint #489 #254
+- Refactor URLs. `store.self_url()` returns an `AtomicUrl`, which provides methods to easily add paths, find subdomains and more.
+- Add support for subdomains, use a Wildcard TLS certificate #502
 - Improve query performance, refactor indexes. The `.tpf` API is deprecated in favor of the more powerful `.query`. #529
 - Improved error handling for HTTPS initialization #530
 - Add `--force` to `atomic-server import` #536