Update changelog

docs/simplesamlphp-changelog.md

@@ -11,6 +11,8 @@ See the upgrade notes for specific information about upgrading.
 Released TBD
 
   * Replace custom Email class with the phpmailer library.
+  * Allow to log to STDERR in the logging.handler option.
+  * Allow use of stream wrappers (e.g. s3://) in paths.
 
 ### metarefresh
   * The algorithm to compute the fingerprint of the certificate that signed
@@ -20,6 +22,8 @@ Released TBD
 ### saml
   * Make the id of the generated signed metadata only change when metadata
     content changes.
+  * New SP options `AssertionConsumerService` and `SingleLogoutServiceLocation`
+    that allow to override the default URL paths.
 
 ### Interoperability
   * The minimum PHP version required is now 5.6.