find a better place for the link to it than alongside bsddb & friends.

add expat_config.h.

possibly "rounding up" to the next whole second.

since this value is used to name the build directory.

them to the Error errors list.

Printing to stdout, doesn't mean the data was actually written.
It depends on the buffering, so we need to flush.  This will hopefully
really fix the buildbots getting killed due to no output on the slow bots.

(since they won't trigger if zlib is already sucessfully imported); they
were found by grepping .py files, instead of looking at warning output :)

 - Warn-raise ImportWarning when importing would have picked up a directory
   as package, if only it'd had an __init__.py. This swaps two tests (for
   case-ness and __init__-ness), but case-test is not really more expensive,
   and it's not in a speed-critical section.

 - Test for the new warning by importing a common non-package directory on
   sys.path: site-packages

 - In regrtest.py, silence warnings generated by the build-environment
   because Modules/ (which is added to sys.path for Setup-created modules)
   has 'zlib' and '_ctypes' directories without __init__.py's.

than a convenient power-of-2-and-multiple-of-5, so incorrect testing
algorithms fail more easily.

using a prime number, rather than a convenient power-of-2-and-multiple-of-5,
so incorrect testing algorithms fail more easily.

are newer then fficonfig.py.

This may be a useful style question for the docs -- should examples show
the necessary imports, or should it be assumed that the reader will
figure it out?  In the What's New, I'm not consistent but usually opt
for omitting the imports.