Update 7.0.0 Release Notes for -rc.1

docs/unraid-os/release-notes/7.0.0.md

@@ -74,6 +74,8 @@ If you previously had Outgoing Proxies set up using the Proxy Editor plugin or s
 If you roll back after enabling the [overlay2 storage driver](#add-support-for-overlay2-storage-driver) you will need
 to delete the Docker directory and let Docker re-download the image layers.
 
+If you roll back after installing [Tailscale in a Docker container](#tailscale-integration), you will need to edit the container, make a dummy change, and **Apply** to rebuild the container without the Tailscale integration.
+
 After rolling back, make a dummy change to each WireGuard config to get the settings appropriate for that version of Unraid.
 
 If rolling back earlier than 6.12.10, also see the [6.12.10 release notes](https://docs.unraid.net/unraid-os/release-notes/6.12.10/#rolling-back).
@@ -421,6 +423,7 @@ tweaked our defaults.
 * Samba smb.conf: set "nmbd bind explicit broadcast = no" if NetBIOS enabled
 * Add fastcgi_path_info to default nginx configuration
 * Ensure calls to pgrep or killall are restricted to the current namespace
+* (Advanced) Added ability to apply custom udev rules from `/boot/config/udev/` upon boot
 
 ## Linux kernel