Previously the surfaces stored a flag if the system memory copy was
ahead of the gl copy(SFLAG_DIRTY) or the gl copy is
ahead(SFLAG_GLDIRTY). The pbuffer copy was 'managed' differently using
SFLAG_INPBUFFER and SFLAG_INTEXTURE.

This patch replaces them with 3 flags, INSYSMEM, INPBUFFER and
INTEXTURE which specify which copy contains the most up to date
copy. It is perfectly valid to have more than one of those flags
set. One must be set at least (except at init, when no content is in
the surface yet). When one copy is modified, the flags for the others
are removed.

The method is removed because it does not really help with
anything. It should not be exported from wined3d, there is no need for
the other libs to call it. It does not help abstraction and code
simplification in any way because it is very specific and the code
calling it has to know what is happening in the surface to use this
method.

Thanks to Peter Oberndorfer for noticing this.

server: A general solution for handling MAXIMUM_ALLOWED access right has been implemented so remove the workarounds.

The gl viewport origin is the lower left corner of the window, in d3d
it is the upper right corner. This is corrected when setting the
viewport. However, when we are doing offscreen rendering, this is
reversed. So do not flip the viewport origin when rendering offscreen.

Except with fbos, it is not possible to remove the depth stencil
buffer from the opengl frame buffer, so when the d3d app sets a NULL
depth stencil disable all states that work with the depth stencil
buffer.

This helps performance a bit because the function does not have to
wait for the 2nd read to finish before returning. Only do that if we
have an aux buffer to mess with for free though.

Plain OpenGL does not provide any signed pixel formats, so the
unsigned GL_RGB is used for loading perturbation data into pixel
shaders that use texbem. For correct loading, the signedness has to be
considered.

Add tests for these cases.

secur32: NTLM - don't bother nul terminating the password string as nothing relies on it being nul terminated.

pointers in the SEC_WINNT_AUTH_IDENTITY structure than the
corresponding Length fields say the pointers hold.