wined3d: Rebind the 2D texture corresponding to the p8 surface. In some programs this caused nothing to show up.

wininet: Add a URLCache_FindEntryInHashW helper, and use it to simplify finding an entry in a hash with a wide-character URL string.

These mean that the file should have full permissions for everyone.

winex11.drv: Remove the coloruse == -1 special case. Add X11DRV_DIB_GetColorCount() for computing a bitmap's number of colors.