Thanks to Paul Vriens for pointing out the need for this.

Add more IP option defines.

Add defines for address string lengths for IPv4 and IPv6.

We'd have to use the Windows environment anyway, not the Unix one.

We were passing uninitialized data which would ultimately end up in the
registry.

This value does not exist directly under the product key on Windows.

Initialization of the bitfield done in find_ps_compile_args
based on the previously introduced pow2Matrix_identity flag.

New flag helps to quickly find out whether the pow2Matrix is a
identity matrix (no texcoord fixup needed) or not.

This avoids deadlocks with the loader lock.