#4542: On Windows, binascii.crc32 still accepted str as binary input.
This fixes test_binascii.

Will backport to 3.0
diff --git a/Misc/NEWS b/Misc/NEWS
index 15e3401..87af173 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -16,6 +16,9 @@
 Library
 -------
 
+- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
+  the corresponding tests now pass.
+
 - Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
   it was calling the wrong open() function.