Initial patch by Nir Aides.

StreamReaderWriter. Deprecate StreamReader, StreamWriter, StreamReaderWriter,
StreamRecoder and EncodedFile() of the codec module. Use the builtin open()
function or io.TextIOWrapper instead.

Make silent a false positive of the Clang Static Analyzer.

Bug found by the Clang Static Analyzer.

Bug found by the Clang Static Analyzer.

Dummy change to avoid a false positive with the Clang Static Analyzer.

In some cases, fullpath value is used whereas fullpath was not always
initialized. Warning found by the Clang Static Analyzer.

Warnings found by the Clang Static Analyzer.

Warnings found by the the Clang Static Analyzer.

returns None.

returns None.

an IOError if the file is closed.

an IOError if the file is closed.

the file is closed.

Copy/paste code from textiowrapper_read_chunk().

Fix closes issue #11109 -  socketserver.ForkingMixIn leaves zombies, also fails to reap all zombies in one pass.

A new method called service_action is made available in BaseServer, called by
serve_forever loop. This useful in cases where Mixins can use it for cleanup
action. ForkingMixin class uses service_action to collect the zombie child
processes. Initial Patch by Justin Wark.

Also remove outdated and unhelpful docstrings in test_sysconfig.

Patch by Sijin Joseph.