Skipped tests are now marked as skipped, formerly commented-out or
renamed-so-it-doesn't-look-like-a-test tests are uncommented, properly named,
and unconditionally skipped, some tests that simply didn't run before
are now able to run, and a few are split into multiple methods instead of
skipping via 'return' in the middle of a method.  Also, a couple of unused
files are removed completely.

[1] https://mail.python.org/pipermail/python-dev/2014-June/135018.html

Issue #21711: support for "site-python" directories has now been removed from the site module (it was deprecated in 3.4).

repr(Handle) is shorter for function: "foo" instead of "<function foo at
0x...>". It now also includes the source of the callback, filename and line
number where it was defined, if available.

repr(Task) now also includes the current position in the code, filename and
line number, if available. If the coroutine (generator) is done, the line
number is omitted and "done" is added.

repr(Handle) is shorter for function: "foo" instead of "<function foo at
0x...>". It now also includes the source of the callback, filename and line
number where it was defined, if available.

repr(Task) now also includes the current position in the code, filename and
line number, if available. If the coroutine (generator) is done, the line
number is omitted and "done" is added.

bindings for Idle so Caps Lock does not disable them. Patch by Roger Serwy.

I forgot to run all the affected tests when I fixed smtpd.

This worked by accident on Linux because the SOCK_STREAM was returned
first, but on the FreeBSD the SOCK_DGRAM is first in the list.

Patch by Claudiu Popa.

Patch by Milan Oberkirch.

Eventually these will want to convert to decode_data=False, I think.

Otherwise smtpd is restricted to 7bit clean data, since even if the
incoming data is actually utf-8, it will often break things to decode
it before parsing the message.

Patch by Maciej Szulik, with some adjustments (mostly the warning
support).