Issue #26268: merge from 3.5

diff --cc Misc/NEWS
index b7ac0ceba0d2152402a39502d5981aa57d061515,b33558a394ecee21ad86c876d7d3fb381d20c8b3..c4e50ca257a6200240da1d5ecc0816d5c01f047f
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -723,14 -243,7 +723,14 @@@ Buil
  
  - Issue #25696: Fix installation of Python on UNIX with make -j9.
  
- - Issue #25798: Update OS X 10.5 installer to use OpenSSL 1.0.2e.
 +- Issue #24986: It is now possible to build Python on Windows without errors
 +  when external libraries are not available.
 +
 +- Issue #24421: Compile Modules/_math.c once, before building extensions.
 +  Previously it could fail to compile properly if the math and cmath builds
 +  were concurrent.
 +
+ - Issue #26268: Update OS X 10.5 installer to use OpenSSL 1.0.2f.
  
  Windows
  -------