Change Log 7.8.4 - 7.8.5 (January 12, 2018)

Preliminary Change Log 7.8.4 -> 7.8.5

• Mac screensaver: under OS 10.13+ if the BOINC screensaver cannot display a graphics app with hardware acceleration using the IOSurface APIs because the app has not been linked with the current graphics libraries, then display it using the much slower CGWindowListCreateImage API.