Added a registry setting to control the behavior: WindowsFloatWhenInactive
with possible values "none", "all, and "nonfullscreen" which is the default.

As opposed to any time a light parameter changed.

wined3d: Only write gl_ClipVertex if clipping is enabled in shader_glsl_generate_ffp_vertex_shader().

This also corrects our HREFTYPE values a little bit.

d3dx9_36: Port mesh code to use ID3DXFile instead of IDirectXFile and enable D3DXLoadSkinMeshFromXof.

server: Automatically sets a socket to non-blocking mode when WSAAsyncSelect or WSAEventSelect is called even when lEvent is zero.