Graphics in Debian 9 & Zero-K

[Oflameo <oflameo2@gmail.com>]

First issue:

https://springrts.com/mantis/view.php?id=5634

This Kloot character keeps closing my promoted Zero-K tickets that get
promoted because of Spring engine issues. On Debian 8, the game ran
slow. On Debian 9 the game doesn't start.

A couple days ago, he said that my POLARIS10 drivers were Obviously
VMWare drivers and closed the ticket looking straight at my dmesg
output and said I misconfigured my system, which I just did a clean
install on so I can dodge the accusation.

I am looking to find undeniable evidence that I am infact using my
RX470 with POLARIS10 drivers and not VMWare Drivers. If it takes
getting multiple Debian Developers to verify and sign off on the
drivers I am using to discredit Kloot, it is wort it to me.

Second issue:

https://springrts.com/mantis/view.php?id=5620

Even though my glxinfo also obviously says I am running my Graphics
using POLARIS10 drivers like dmesg did, it says it only supports OpenGL
3.0 when my card supports OpenGL 4.5.

http://www.thinkcomputers.org/sapphire-nitro-rx-470-oc-graphics-card-re
view/

Extended renderer info (GLX_MESA_query_renderer):
    Vendor: X.Org (0x1002)
    Device: AMD POLARIS10 (DRM 3.8.0 / 4.9.0-3-amd64, LLVM 3.9.1)
(0x67df)
    Version: 13.0.6
    Accelerated: yes
    Video memory: 4037MB
    Unified memory: no
    Preferred profile: core (0x1)
    Max core profile version: 4.3
    Max compat profile version: 3.0
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 3.1
OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD POLARIS10 (DRM 3.8.0 /
4.9.0-3-amd64,
 LLVM 3.9.1)
OpenGL version string: 3.0 Mesa 13.0.6

How do I get OpenGL 4.5 support out of Mesa on Debian 9?