Merge branch 'DRTVWR-559' of https://github.com/secondlife/viewer into DRTVWR-559

doc/contributions.txt

indra/llcorehttp/tests/test_llcorehttp_peer.py

indra/llmath/llcamera.cpp

indra/llmath/llcamera.h

indra/llprimitive/llgltfmaterial.cpp

indra/llprimitive/llgltfmaterial.h

indra/llprimitive/llmaterial.cpp

indra/llprimitive/lltextureentry.cpp

indra/llrender/llimagegl.cpp

indra/newview/app_settings/settings.xml

...newview/app_settings/shaders/class1/deferred/cloudsF.glsl

...a/newview/app_settings/shaders/class1/deferred/moonF.glsl

indra/newview/app_settings/shaders/class1/deferred/skyF.glsl

.../newview/app_settings/shaders/class1/deferred/starsF.glsl

...ewview/app_settings/shaders/class1/deferred/sunDiscF.glsl

...w/app_settings/shaders/class1/interface/radianceGenF.glsl

.../newview/app_settings/shaders/class2/deferred/alphaF.glsl

...pp_settings/shaders/class3/deferred/multiPointLightF.glsl

...app_settings/shaders/class3/deferred/multiSpotLightF.glsl

...pp_settings/shaders/class3/deferred/reflectionProbeF.glsl