New Deadwood snapshot: filter_rfc1918 now fully tested

I have created a SQA test for filter_rfc1918, fixed a bug where it did not work unless blacklist_ip was also enabled, and made sure Deadwood passes all regressions. It can be downloaded here:

http://maradns.org/deadwood/snap/

In addition, I have made sure the code compiles with no warnings in recent versions of GCC and compiles without problem in TCC and have made a release of Deadwood's source code with TCC bundled so people can compile Deadwood on Windows without needing to install MinGW + MSYS:

http://maradns.org/deadwood/TCC/