Issue #16298: In HTTPResponse.read(), close the socket when there is no Content-Length and the incoming stream is finished.

Patch by Eran Rundstein.

Lib/httplib.py

@@ -565,6 +565,10 @@ class HTTPResponse:
             self.length -= len(s)
             if not self.length:
                 self.close()
+        else:
+            if not s:
+                self.close()
+
         return s
 
     def _read_chunked(self, amt):