Log Message:
(graphics/R-rgl) Updatd 1.3.14 to 1.3.17

# rgl 1.3.17

## Bug fix

* The previous fix for `rgl.init()` introduced a new possible
segfault for users who had DISPLAY unset or set to a non-existent
server.

# rgl 1.3.16

## Bug fixes

* `triangulate()` now uses the `earcut` library
from https://github.com/mapbox/earcut.hpp, which
should be faster and more reliable than the
previous R implementation.
* In cases where the X11 server did not provide sufficient
support, `rgl.init()` could sometimes segfault.  That has
been fixed, and warning messages have been made more
informative.