Fixes #1545696 and #1566140. Will backport to 2.5.

for test_nis. Will backport to 2.5.

  ctypes isn't considered as requiring executable stacks.
Will backport to 2.5.

Will backport to 2.5.

decode unicode objects and returns an unicode object when the argument is one.

PyArg_ParseTuple.

it if it is supported.

Check this and raise an error when something else is used - before
this change ctypes would hang or crash when such a callback was
called.  This is a partial fix for #1574584.

Will backport to release25-maint.

- Bug #1578513: Cross compilation was broken by a change to configure.
Repair so that it's back to how it was in 2.4.3.

Will backport to 2.5.

when the module is launched as a script.

to CRLF instead.

Also be consistent with modifying only mtime, not atime.

Will backport to 2.5.

Will backport to 2.5.

files in VC7. Will backport to 2.5.

and inline jumps to returns.

user-defined datatypes.