[3.6] [3.7] bpo-22005: Fixed unpickling instances of datetime classes pickled by Python 2. (GH-11017) (GH-11022) by miss-islington · Pull Request #11024

[3.6] [3.7] bpo-22005: Fixed unpickling instances of datetime classes pickled by Python 2. (GH-11017) (GH-11022) by miss-islington · Pull Request #11024 · python/cpython

…ed by Python 2. (pythonGH-11017) (pythonGH-11022)

encoding='latin1' should be used for successful decoding.
(cherry picked from commit 8452ca1)
(cherry picked from commit 0d5730e)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>