Misc doc updates

Author: nblock

docs/about/features.md

@@ -25,6 +25,7 @@ provides on overview of headscale's feature and compatibility with the Tailscale
     - [ ] `autogroup:member`
 * [ ] Node registration using Single-Sign-On (OpenID Connect) ([GitHub label "OIDC"](https://github.com/juanfont/headscale/labels/OIDC))
     - [x] Basic registration
+    - [ ] Update user profile from identity provider
     - [ ] Dynamic ACL support
     - [ ] OIDC groups cannot be used in ACLs
 - [ ] [Funnel](https://tailscale.com/kb/1223/funnel) ([#1040](https://github.com/juanfont/headscale/issues/1040))

docs/ref/acls.md

@@ -40,9 +40,6 @@ servers.
 
 ## ACL setup
 
-Note: Users will be created automatically when users authenticate with the
-headscale server.
-
 ACLs have to be written in [huJSON](https://github.com/tailscale/hujson).
 
 When [registering the servers](../usage/getting-started.md#register-a-node) we

docs/ref/remote-cli.md

@@ -69,7 +69,7 @@ headscale apikeys expire --prefix "<PREFIX>"
 
         !!! bug
 
-            Headscale 0.23.0 requires at least an empty configuration file when environment variables are used to
+            Headscale currently requires at least an empty configuration file when environment variables are used to
             specify connection details. See [issue 2193](https://github.com/juanfont/headscale/issues/2193) for more
             information.
 

docs/setup/upgrade.md

@@ -1,6 +1,6 @@
 # Upgrade an existing installation
 
-An existing headscale installation can be updated to a new version:
+Update an existing headscale installation to a new version:
 
 - Read the announcement on the [GitHub releases](https://github.com/juanfont/headscale/releases) page for the new
   version. It lists the changes of the release along with possible breaking changes.