Merge x86 changes into AMD64.

explicitely disable the use of Windows XP themes when compiling tk.
This is also consistent with the WINVER=0x0500 option.

because IPPROTO_IPV6 may be an enumeration member...

Commit more often.

should implement less than or equal to (as the code does).

It caused: "Fatal Python error: UNREF invalid object" in the DoubleTest.

Some functions in the msvcrt module are skipped,
and socket.ioctl is enabled only when using a more recent Platform SDK.

(and yes, there are still companies that use a 10-years old compiler)

This should prevent some test_multiprocessing failures

Also remove references to odbc libraries, which are not shipped with vs2003 express.
(and certainly not useful)

if its UUID has lowercase letters.

keys in type dictionaries without using this locals() hack.