* TTLS, PEAP, TEAP, and EAP-FAST are not implemented.
* The "haproxy" and "reverse CoA' features are not implemented
* The Perl, Python, and Lua modules do not fully support the v4 "nested" attributes.
-* We will likely remove the requirement to use `&` as a prefix for attribute names. This change will likely require you to change all of your configuration.
+* Enums are now prefixed with `::`, as in `Service-Type == ::Framed-User`.
+ * The server still does not always require (or print) the `::` prefix. That will change.
+* As a result of adding `::` for enums, we can then remove the requirement to use `&` as a prefix for attribute names.
+ * This change may require changes to all of the configuration. We will try to allow `&` or not, but that may not be possible.
+* Dynamic expansions will change from `%{md5:foo}` to `%md5(foo)`.
+ * The new syntax is much clearer
+ * Expansions such as `%{User-Name}` will still work. But `%{1+2}` will also work!
+ * `%{foo:-%{bar}}` will be replaced by `%{foo || bar}`, which is clearer and uses less nesting
+
+
Please be aware that v4 is in "alpha" right now. If it works, great.
If it doesn't work, then please return to using v3.