add note about corrected tiger hash output

diff --git a/UPGRADING b/UPGRADING
index bbc54780482750fa63d8d34c4db1f63e18f6351d..d92e0573bce5007b25168ae6050d7be9c8752a0b 100755 (executable)
--- a/UPGRADING
+++ b/UPGRADING
@@ -467,6 +467,10 @@ b. Extensions with changed behavior
        is set with date.timezone and/or date_default_timezone_set().
        Instead it will always fall back to "UTC".
 
+   - Hash extension
+     - the output of the tiger hash family has been corrected, see
+       https://bugs.php.net/61307
+
 ===========================
 10. Changes in SAPI support
 ===========================