Merge branch 'master' 6.4.10 into DRTVWR-510

.clang-format

indra/cmake/00-Common.cmake

indra/llinventory/llsettingssky.cpp

indra/llrender/llrender.cpp

indra/llrender/llshadermgr.cpp

indra/newview/VIEWER_VERSION.txt

indra/newview/app_settings/settings.xml

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

...pp_settings/shaders/class1/deferred/fullbrightShinyF.glsl

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

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

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

.../app_settings/shaders/class1/environment/encodeNormF.glsl

...app_settings/shaders/class1/lighting/lightAlphaMaskF.glsl

...gs/shaders/class1/lighting/lightFullbrightAlphaMaskF.glsl

...pp_settings/shaders/class1/lighting/lightFullbrightF.glsl

...ttings/shaders/class1/lighting/lightFullbrightShinyF.glsl

..._settings/shaders/class1/windlight/atmosphericsFuncs.glsl

.../newview/app_settings/shaders/class1/windlight/moonF.glsl

.../newview/app_settings/shaders/class1/windlight/moonV.glsl