Issue #1285086: Get rid of the refcounting hack and speed up

urllib.parse.unquote() and urllib.parse.unquote_to_bytes().

diff --cc Misc/NEWS
index c5a58775e2735b021babf787abeb59f651bd70f3,8bcf4976b1e3f1519c9998251a7f0c06742fdbd0..a6d05fe814850aa73e69f74707b0c7d4ebdcba8e
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -280,11 -193,9 +280,14 @@@ Core and Builtin
  Library
  -------
  
+ - Issue #1285086: Get rid of the refcounting hack and speed up
+   urllib.parse.unquote() and urllib.parse.unquote_to_bytes().
+ 
 +- Issue #17099: Have importlib.find_loader() raise ValueError when __loader__
 +  is not set, harmonizing with what happens when the attribute is set to None.
 +
 +- Expose the O_PATH constant in the os module if it is available.
 +
  - Issue #17368: Fix an off-by-one error in the Python JSON decoder that caused
    a failure while decoding empty object literals when object_pairs_hook was
    specified.