Merge

diff --cc Misc/NEWS
index 70258dcd054b3b9b78a862d5203dfdaa1e107808,adcbc727fffa8b619e01869d3cab38b164d9e8db..48baa45f33e3fa3fd55bcf7c0b4fd97ad27422d9
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -40,8 -40,14 +40,16 @@@ Core and Builtin
  Library
  -------
  
 +- Issue: #15138: base64.urlsafe_{en,de}code() are now 3-4x faster.
 +
+ - Issue #444582: Add shutil.which, for finding programs on the system path.
+   Original patch by Erik Demaine, with later iterations by Jan Killian
+   and Brian Curtin.
+ 
+ - Issue #14837: SSL errors now have ``library`` and ``reason`` attributes
+   describing precisely what happened and in which OpenSSL submodule.  The
+   str() of a SSLError is also enhanced accordingly.
+ 
  - Issue #9527: datetime.astimezone() method will now supply a class
    timezone instance corresponding to the system local timezone when
    called with no arguments.