In C89, you can only initialize the first member of a union within a declaration. Unfortunately, that is the S_un_b UCHAR array for the S_un union inside struct in_addr.
So we have to initialize it with each UCHAR member of Address.
- REVISION is now something like "0.4.7-dev-53-g1304b53" instead of "r12345".
- Change WINDOWS_NT_BANNER to better represent the ReactOS version and the reported NT version.
- Introduce REACTOS_COMMIT_HASH which contains the full 40-character commit hash (for comparing revisions, e.g. in rosautotest/testman).