Issue #19524: Fixed resource leak in the HTTP connection when an invalid
response is received.  Patch by Martin Panter.
Issue #22131: Fixed a bug in handling an error occured during reading from
a pipe in _ipconfig_getnode().
Issue #22226: Added private function _splitdict() in the Tkinter module.

First letter no longer is stripped from the "status" key in
the result of Treeview.heading().