winemac: Disable software GL rendering unless it's enabled via a new registry setting, AllowSoftwareRendering.

[Ken Thomases]

This more closely corresponds to how GLX behaves on Macs.

For <http://bugs.winehq.org/show_bug.cgi?id=34051>.
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dlls/winemac.drv/macdrv.h      | 1 +
dlls/winemac.drv/macdrv_main.c | 4 ++++
dlls/winemac.drv/opengl.c      | 5 +++++
3 files changed, 10 insertions(+)

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