gzip.GzipFile may not exist as a parent class

zlib/gzip may not be present for all builds.  Make xmlrpclib gracefully not supporg gzip encoding in this case

auth handlers. Fixed tests to reflect the same.

float infinities and nans.  Backport of r74078 from py3k.

for generating the configure script.

Original idea by Martin von Löwis.

without format arguments.

mangling the array declarations in it.

to ensure they don't get mangled.

This will be helpful to people who want to compile Python with a
cross-compiler. Now you can upload the configure script on your host
machine, run it with caching enabled, and download the cached results
on your build machine.

This is mostly an aesthetic change.

across different machine architectures and compatibility with Python 3.x.

issues mentioned in #3410.

Prepare for Windows 7 (still commented out).

command helper functions.

See #6479 for some motivation.