It's still not necessary to build, but may be useful to some.

In some Tcl versions -2147483648 is wide integer.

robust at shutdown. If needs to release multiple resources, they are released
even if errors are occured.

This will prevent failures from the version of NASM installed on buildbots,
if the ability to override the version used is desired again later, we can
figure out a way to opt in.

"Pipes and Queues" and "Synchronization between processes" subsections.

Patch by Davin Potts.

are down, don't use anymore in test_urllib2net

ftp.kernel.org is also slow or down, so reuse the same FTP servers than Python
3.4 and 3.5: use ftp.debian.org instead.

connection failed.

os.urandom() only tries to make the os.random() file descriptor non
inheritable, but there is no guarantee. The test fails on too many operating
systems: Windows, OS X 10.5, OpenIndiana.

This issue is correctly fixed in Python 3.4 with the PEP 446. Upgrade to Python
3.4 is you need stronger guarantees.

always returns bool.  tkinter.BooleanVar now validates input values (accepted
bool, int, long, str, unicode, and Tcl_Obj).  tkinter.BooleanVar.get() now
always returns bool.

Patch by Makoto Kato.

Made test XML files non-ASCII.

arbitrary precision integers added in Tcl 8.5.

sendto() instead of the C int type.

  PY_RELEASE_LEVEL to PY_RELEASE_LEVEL_BETA.

Patch by Cédric Krier.

MemoryError.

cleaning up multiple threads.

(OpenBSD 5.6+).