Merge pull request #92 from secondlife/SL-19262

indra/llrender/llshadermgr.cpp

indra/llrender/llshadermgr.h

...wview/app_settings/shaders/class1/deferred/pbralphaV.glsl

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

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

...view/app_settings/shaders/class1/deferred/pbropaqueF.glsl

...view/app_settings/shaders/class1/deferred/pbropaqueV.glsl

...ew/app_settings/shaders/class1/deferred/textureUtilV.glsl

...wview/app_settings/shaders/class2/deferred/pbralphaF.glsl

indra/newview/llfetchedgltfmaterial.cpp

indra/newview/llvovolume.cpp