(Merge 3.4) Issue #16133: The asynchat.async_chat.handle_read() method now

ignores BlockingIOError exceptions. Initial patch written by Xavier de Gaye.

Document also in asyncore documentation that recv() may raise BlockingIOError.

diff --cc Lib/asynchat.py
Simple merge

diff --cc Lib/test/test_asynchat.py
index b74b944bbbcc72b889097788788cc34811024e2a,2dc9d0c17a3ea4de6bede064d339b26b219f5738..3a33fc8b2d783e9b391408758d703cc61ac50569
--- 1/Lib/test/test_asynchat.py
--- 2/Lib/test/test_asynchat.py
+++ b/Lib/test/test_asynchat.py
@@@ -11,7 -12,7 +12,8 @@@ import socke
  import sys
  import time
  import unittest
 +import warnings
+ import unittest.mock
  try:
      import threading
  except ImportError:

diff --cc Misc/NEWS
Simple merge