+ > *NOTE:*
+ v4.x is PHP-8 only.
+
+ * PHP 8 compatibility
+ - Drop ext-propro support
+ PHP 8 removes the object get/set API from the ZendEngine, which renders
+ that extension dysfunctional. As a consequence, the header property of
+ http\Message and derived classes cannot be modified in place, and thus
+ by reference.
+
+ Changes from beta1:
+ * Fixed configure on systems which do not provide icu-config
+ * Fixed gh-issue #89: Cookie handling cannot be disabled since v3.2.1