from Chris RINGEVAL
https://sourceforge.net/p/flightgear/flightgear/merge-requests/273/
Squashed commit of the following:
commit ea6e808e418533db1a41671c67a7873ddbfcc858
Author: Gonzalo Pesquero <gpesquero@yahoo.es>
Date: Sun Nov 21 17:44:44 2021 +0100
Add translations on splash screen
commit 3c47d771877743692f5d0d63e980d6694a549405
Author: Chris Ringeval <eatdirt@protonmail.com>
Date: Sat Nov 27 16:37:31 2021 +0100
Moon direction vector in the eye frame available to shaders
commit 70728f7ea29dad75c34cad69745021ee927bea31
Author: Chris Ringeval <eatdirt@protonmail.com>
Date: Sun Nov 21 22:18:38 2021 +0100
Add altitude to scolor object as needed by Milky Way texturing