Update changelog

Author: joepio

CHANGELOG.md

@@ -7,6 +7,10 @@ See [STATUS.md](server/STATUS.md) to learn more about which features will remain
 
 ## 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