ntdll: Renamed the NTDLL_get/from_server_timeout functions since they don't deal only with timeouts.

Also get rid of the unused timeout field.

Make it an unsigned int to save some space on Win64, if we need to
transfer more than 4Gb over the server pipe something is seriously
wrong.

configure: Add a check for the DGifOpen function in the gif_lib.h header as the v4 of the file does define it, while v3 doesn't.

When using reserved areas the memory could potentially be reused right
after the release.

Implement D3DSIO_TEXREG2AR, TEXREG2GB, TEXREG2RGB, TEXM3X3TEX, TEXM3X3SPEC.