#16937: document that stdin is always buffered, even when -u is used.  Patch by Elena Oat.
#16937: merge with 3.3.
#14853: remove test that was making too many assumptions about stdin.  Patch by Elena Oat.
#14853: merge with 3.3.
Issue #18549: Eliminate dead code in socket_ntohl().
CID 982369
Issue #18549: Eliminate dead code in socket_ntohl().
CID 982369
Closes #18491: Added script-wrapper functionality to launcher source (but not to executable).
#18503: small cleanups in test_email.

Patch by Vajrasky Kok.
#18503: small cleanups in test_email.

Patch by Vajrasky Kok.
#15130: remove repeat of abstract paragraph from socket howto body.

Patch by Tshepang Lekhonkhobe.
Merge #15130: remove repeat of abstract paragraph from socket howto body.
Fix typo on MutableSequence docstring.
#17818: aifc.getparams now returns a namedtuple.

Patch by Claudiu Popa.
Close #18545: now only executes member_type if no _value_ is assigned in __new__.
Issue #18556: Check the return value for PyUnicode_AsWideChar() in
U_set() from ctypes.

CID #486657
merge for issue #18556