Fix the failures on cygwin (2006-08-10 fixed the actual locking issue).
The first hunk changes the colon to an ! like other Windows variants.
We need to always wait on the child so the lock gets released and
no other tests fail. This is the try/finally in the second hunk.
diff --git a/Misc/NEWS b/Misc/NEWS
index 25d0294..f2fc704 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -58,6 +58,8 @@
Tests
-----
+- test_mailbox should now work on cygwin versions 2006-08-10 and later.
+
- Bug #1535182: really test the xreadlines() method of bz2 objects.
- test_threading now skips testing alternate thread stack sizes on