[NetKVM] BZ#950633 Checksum verification fixed

Checksums 0xFFFF and 0x0000 treated equal
as suggested by RFC 1624 sec. 3
[NetKVM] BZ#950633 Checksum verification fixed - NDIS5

Checksums 0xFFFF and 0x0000 treated equal
as suggested by RFC 1624 sec. 3
[NetKVM] BZ#912926 BSOD on Sleep and PNP test in NDIS5 drivers

Acess to freed TX/RX queues on unload fixed
Bugs resulting to interrupt storm fixed:
    1. Disable interrupts on device shutdown
    2. Verify interrupt owner before processing
[NetKVM] BZ#912926 BSOD on Sleep and PNP test in NDIS5 drivers

Fixes ported to NDIS6 drivers:

Acess to freed TX/RX queues on unload fixed (INTx specific)
Bugs resulting to interrupt storm fixed:
    1. Disable interrupts on device shutdown
    2. Verify interrupt owner before processing (INTx specific)