Log Message:
Updated xscreensaver to 5.37.

Most patches merged upstream.

5.37	05-Jul-2017

    New hack, vigilance.
    Added Mac Software Update and VMware to bsod.
    OSX: Grabbing the desktop works again.
    OSX: Pinch to zoom.
    Android: Both Daydreams and Live Wallpapers are implemented.
    Updated webcollage for recent changes.
    Various bug fixes.