#14984: On POSIX, enforce permissions when reading default .netrc.

Initial patch by Bruno Piguet.

This is implemented as if a useful .netrc file could exist without passwords,
which is possible in the general case; but in fact our netrc implementation
does not support it.  Fixing that issue will be an enhancement.
diff --git a/Misc/NEWS b/Misc/NEWS
index de8c202..833cd05 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -13,6 +13,12 @@
 Library
 -------
 
+- Issue #14984: On POSIX systems, when netrc is called without a filename
+  argument (and therefore is reading the user's $HOME/.netrc file), it now
+  enforces the same security rules as typical ftp clients: the .netrc file must
+  be owned by the user that owns the process and must not be readable by any
+  other user.
+
 - Issue #16248: Disable code execution from the user's home directory by
   tkinter when the -E flag is passed to Python.  Patch by Zachary Ware.