(bugs #115903, #115696)

This is based on a patch by Darrel Gallion.  I'm not 100%
sure about this fix, but I haven't managed to come up with
any test case it cannot handle...

- Conform to standard coding style in a few more places.

- Change the default file type to application/octet-stream.
- Add support to recognize .py, .c, .h files as text/plain (this is
  what I use most :-).

Ping apparently doesn't check in Accepted patches, so I'm doing this
for him.

According to Ping: The name of the controller class should be
"Konqueror", not "Konquerer". (See the website
http://www.konqueror.org/.)

Header

Dougfort's comments: httplib does not include ':port ' in the HTTP 1.1
'Host:' header.  This causes problems if the server is not listening
on Port 80.  The test case I use is the login to /manage under Zope,
with Zope listening on port 8080. Zope returns a <frameset> with the
<frame> source URLs lacking the :8080.

-- added some more docstrings
-- fixed typo in scanner class (#125531)
-- the multiline flag (?m) should't affect the \Z operator (#127259)
-- fixed non-greedy backtracking bug (#123769, #127259)
-- added sre.DEBUG flag (currently dumps the parsed pattern structure)
-- fixed a couple of glitches in groupdict (the #126587 memory leak
   had already been fixed by AMK)

  appends to list of filters instead of inserting at the front.  This
  is useful to add a filter with a lower priority than -W options.

- Cosmetic improvements to a docstring and an error message.

<cpr@emsoftware.com>.

When the exception has no message, don't insert a colon after the
exception name.

re-initializing Python (Py_Finalize() followed by Py_Initialize()) to
blow up quickly.  With the DECREF removed I can't get it to fail any
more.  (Except it still leaks, but that's probably a separate issue.)

modification.  Removed the need for that.

  The ASCII-art diagram at the top of httplib contains a backslash at
  the end of a line, which causes Python to remove the newline. This
  one-character patch adds a space after the backslash so it will
  appear at the end of the line in the docstring as intended.

pid across threads (but in that case, it's still the same process, and so
still sharing the "template" cache in tempfile.py).  Repaired that, and
added a new std test.
On Linux, someone please run that standalone with more files and/or more
threads; e.g.,

    python lib/test/test_threadedtempfile.py -f 1000 -t 10

to run with 10 threads each creating (and deleting) 1000 temp files.

Fixed Carbon command-dot handling. There is still a problem, though, and you may have to hit it repeatedly.

The UserPane routines appear to be fixed in the current Universal Headers, so they're re-enabled.

xstat() will never be implemented under Carbon. Fortunately it also doesn't appear to be used anywhere.