Issue #20007: HTTPResponse.read(0) no more prematurely closes connection.

Original patch by Simon Sapin.

diff --cc Lib/http/client.py
Simple merge

diff --cc Lib/test/test_httplib.py
Simple merge

diff --cc Misc/ACKS
Simple merge

diff --cc Misc/NEWS
index e8ab0e7c3589b557424bde4ec1d2c647fc628787,1b58dea47f50e6b81f858941253b5facb2f94b9b..458e43ef5899fbaad9f74c4125cb15799ca2e32b
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -44,19 -29,9 +44,22 @@@ Core and Builtin
  Library
  -------
  
+ - Issue #20007: HTTPResponse.read(0) no more prematurely closes connection.
+   Original patch by Simon Sapin.
+ 
 +- Issue #19946: multiprocessing now uses runpy to initialize __main__ in
 +  child processes when necessary, allowing it to correctly handle scripts
 +  without suffixes and submodules that use explicit relative imports or
 +  otherwise rely on parent modules being correctly imported prior to
 +  execution.
 +
 +- Issue #19921: When Path.mkdir() is called with parents=True, any missing
 +  parent is created with the default permissions, ignoring the mode argument
 +  (mimicking the POSIX "mkdir -p" command).
 +
 +- Issue #19887: Improve the Path.resolve() algorithm to support certain
 +  symlink chains.
 +
  - Issue #19912: Fixed numerous bugs in ntpath.splitunc().
  
  - Issue #19911: ntpath.splitdrive() now correctly processes the 'İ' character