bpo-29572: Update Windows build to OpenSSL 1.0.2k (GH-442)

diff --git a/Misc/NEWS b/Misc/NEWS
index 692dc18..2bdf540 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -276,6 +276,8 @@
 Build
 -----
 
+- bpo-29572: Update Windows build and OS X installers to use OpenSSL 1.0.2k.
+
 - Issue #26851: Set Android compilation and link flags.
 
 - Issue #28768: Fix implicit declaration of function _setmode. Patch by
diff --git a/PCbuild/get_externals.bat b/PCbuild/get_externals.bat
index a5185be..98a755d8 100644
--- a/PCbuild/get_externals.bat
+++ b/PCbuild/get_externals.bat
@@ -54,7 +54,7 @@
 set libraries=

 set libraries=%libraries%                                    bzip2-1.0.6

 if NOT "%IncludeSSL%"=="false" set libraries=%libraries%     nasm-2.11.06

-if NOT "%IncludeSSL%"=="false" set libraries=%libraries%     openssl-1.0.2j

+if NOT "%IncludeSSL%"=="false" set libraries=%libraries%     openssl-1.0.2k

 set libraries=%libraries%                                    sqlite-3.14.2.0

 if NOT "%IncludeTkinter%"=="false" set libraries=%libraries% tcl-core-8.6.6.0

 if NOT "%IncludeTkinter%"=="false" set libraries=%libraries% tk-8.6.6.0

diff --git a/PCbuild/python.props b/PCbuild/python.props
index dde94f7..d6bfd08 100644
--- a/PCbuild/python.props
+++ b/PCbuild/python.props
@@ -45,7 +45,7 @@
     <sqlite3Dir>$(ExternalsDir)sqlite-3.14.2.0\</sqlite3Dir>
     <bz2Dir>$(ExternalsDir)bzip2-1.0.6\</bz2Dir>
     <lzmaDir>$(ExternalsDir)xz-5.2.2\</lzmaDir>
-    <opensslDir>$(ExternalsDir)openssl-1.0.2j\</opensslDir>
+    <opensslDir>$(ExternalsDir)openssl-1.0.2k\</opensslDir>
     <opensslIncludeDir>$(opensslDir)include32</opensslIncludeDir>
     <opensslIncludeDir Condition="'$(ArchName)' == 'amd64'">$(opensslDir)include64</opensslIncludeDir>
     <nasmDir>$(ExternalsDir)\nasm-2.11.06\</nasmDir>
diff --git a/PCbuild/readme.txt b/PCbuild/readme.txt
index c04ba4e..8924b3f 100644
--- a/PCbuild/readme.txt
+++ b/PCbuild/readme.txt
@@ -169,7 +169,7 @@
     Homepage:

         http://tukaani.org/xz/

 _ssl

-    Python wrapper for version 1.0.2j of the OpenSSL secure sockets

+    Python wrapper for version 1.0.2k of the OpenSSL secure sockets

     library, which is built by ssl.vcxproj

     Homepage:

         http://www.openssl.org/