Will the real 2.1.7 release please stand up?
Merge remote-tracking branch 'upstream/master'
Undo MD2 Spin Frame Interpolation

Because apparently people don't like them like that.
OpenGL Multi-Property FOF's

Multi-Property FOF's have their multiple side properties display in
OpenGL.
SDL2: disable hardware support by default for now
Merge remote-tracking branch 'Sryder13/master'
Merge branch 'master' into sdl2