simply ignore headers with no name (#19996)

Patch by Cory Benfield.
diff --git a/Misc/NEWS b/Misc/NEWS
index f21dbe8..6582bab 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -15,6 +15,9 @@
 Library
 -------
 
+- Issue #19996: Make :mod:`httplib` ignore headers with no name rather than
+  assuming the body has started.
+
 - Issue #20188: Support Application-Layer Protocol Negotiation (ALPN) in the ssl
   module.