Issue #16481: Merge

diff --cc Lib/multiprocessing/forking.py
Simple merge

diff --cc Misc/NEWS
index 870b7454d2dd94ad49a9fca8ecb2ad053a0f50af,9e456057c6d2bbcdb02b8d5843ef8d95271438cf..7ffbd7b1351fcb38baa0f62a13f0bdd8c4665581
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -127,9 -85,8 +127,11 @@@ Core and Builtin
  Library
  -------
  
+ - Issue #16481: multiprocessing no longer leaks process handles on Windows.
+ 
 +- Issue #12428: Add a pure Python implementation of functools.partial().
 +  Patch by Brian Thorne.
 +
  - Issue #16140: The subprocess module no longer double closes its child
    subprocess.PIPE parent file descriptors on child error prior to exec().