error handler from the new IO library.

to CFLAGS instead of BASECFLAGS.

This fixes issue 8366 and is needed due to
changes introduced in the fix for issue 1628484.

the right version of Tcl/Tk is available (on OSX)

Fixes issue #5651

 * Popen() avoids ugly shell escape: target.replace('"', '\\"')
 * Use proc.communicate() instead of f.stdout.read()
 * Get output from stdout by splitting with ": " instead of splitting by spaces
   to support filename with spaces

This is presumably related to issue 3864, and appears to be due
to a platform bug on freebsd6.

available cipher list.  Helps fix test_ssl with OpenSSL 1.0.0.

Two itimer tests and an interprocess signal test fail on FreeBSD 6 if
any test that starts a thread runs before test_signal.  Since FreeBSD7
does not show this behavior, the bug is most likely a platform bug,
so this patch just skips the failing tests on freebsd6.

Rather than depending on some sleep value, start up an interpreter
as a subprocess and communicate with it. Because subprocess pipes
can't be read from until EOF and I want to read from them before that,
use ctypes to peek by using PeekNamedPipe. Once the subprocess has
written the message, then it is ready to roll and accept signals.
After that, kill it.

#5250: document __instancecheck__ and __subclasscheck__.  I hope the part about the class/metaclass distinction is understandable.

David Bolen's buildbot isn't know for it's speed, and it seems that we
may have been trying to kill the subprocess before it was fully
initialized. I ran with this change on the bot itself and it seemed to work.