various iterables.

(Copied from test_deque.py as suggested by Jim Jewett in SF bug #1166274)

- more consistent markup
- elaborate a couple of points

(Copied from test_deque.py as suggested by Jim Jewett in SF bug #1166274)

outputs with the distribution object.

line.

- fix indentation to conform to the Python style guide
- add more tests and documentation

added support for the provides, requires, and obsoletes metadata fields

support for posix semaphores.

- .wsdl --> Web Service Definition Language
- .xpdl --> XML Process Definition Language

Indicate to the user when this is an upgrade installation.
Make CHM file non-advertised.
Backported to 2.4.

Backported to 2.4

Made traceback unconditional, to avoid lock contention problems when logging errors occur in a custom importer (SF path #1158052).

Added optional encoding argument to file handlers. Made traceback import unconditional, to avoid lock contention problems which occur when logging from custom importers (SF patch #1158052)

Bug #1160802:  Can't build Zope on Windows w/ 2.4.1c1.

MSVCCompiler.initialize():  set self.initialized to True, as suggested
by AMK.  Else we keep growing the PATH endlessly, with each new C
extension built, until putenv() complains.

No change to NEWS because the patch that created this bug is also new
for 2.5a1 (so there's no change here to any code yet released from HEAD).