Fixes SF Bug #850981

It's possible to create insane datetime objects by using the constructor
"backdoor" inserted for fast unpickling.  Doing extensive range checking
would eliminate the backdoor's purpose (speed), but at least a little
checking can stop honest mistakes.

Bugfix candidate.

when keep_blank_values is true.

off a new compiler wng under MSVC6).

the newly created tuples, but tuples added in the freelist are now cleared in
tupledealloc already (which is very cheap, because we are already
Py_XDECREF'ing all elements anyway).

Python should have a standard Py_ZAP macro like ZAP in pystate.c.

Fixes SF Bug #773356

[Part of patch #909005] Repeating exception changed from 'raise socket.error, why' to just raise.  Make use of connect_ex() raise socket.error with 2-tuple instead of just error code

(Reported by Matthias Klose)

Removed the entire __name__ == '__main__' block.

Modified string.split documentation to reflect behaviour of splitting emtpy string.  Closes SF bug #811604

NULL in case of error, but the functions are declared to return int.
MSVC 6 properly complains about that.  Return -1 on error instead.

Gives 30% speedup on "a,b=1,2" and 25% on "a,b,c=1,2,3".

automatically.

existent path.  Pointed out by jvr that entries could be non-file items for
custom importers.

for regex syntax.
Fixes bug #883604 .

isinstance() or issubclass() to the recursion limit of the interpreter.

Change %08l to %p to print a pointer.
Will backport to 2.3.

'a.extend(a)' isn't so special anyway.

I've been bitten by this myself in the past half year.
I hope this fix is right.
I'll backport this to 2.3.