Needs backport.

Fix _sys_version() so it works with the new buildno, not sure if it is correct.  test_platform passes

Fix some 64-bit issues due to mismatch format characters w/actual data types

Don't double check for NULLs and don't initialize if not necessary.
No functional changes.

Add C API function Py_GetBuildNumber(), add it to the interactive prompt
banner (i.e. Py_GetBuildInfo()), and add it as the sys.build_number
attribute.  The build number is a string instead of an int because it may
contain a trailing 'M' if there are local modifications.

We still need a change in the reference manual to reflect the
new try statement.

Modified since ast-arenas was implemented.

simplifies a lot of error handling code, and fixes many memory leaks.

(reported by Chris Olds).  Backported from the 1.0.6 development
branch.

just like string codecs.

	http://www.tortall.net/mu/blog/2005/12/01

Pointed out from SF #1365916.

Backport candidate.

(calling ftell(stdin) doesn't seem defined).  So we won't test errors
from ftell unless we can do it portably.

using the Python implementations of the functions. This imcreases code
coverage and makes sure that both implementations do the same thing.