#3911 FTP.makeport was giving bad port numbers

reviewed by Benjamin and Antoine
diff --git a/Misc/NEWS b/Misc/NEWS
index 294c183..d4d0b42 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -22,6 +22,8 @@
 Library
 -------
 
+- Issue #3911: ftplib.FTP.makeport() could give invalid port numbers.
+
 - Issue #3929: When the database cannot be opened, dbm.open() would incorrectly
   raise a TypeError: "'tuple' object is not callable" instead of the expected
   dbm.error.