Disable rim lighting (r_rimLighting) by default

"Rim lighting" purports to make the edges of models stand out. However
in my tests, I don't see a very strong correlation between the parts
which are lit up and the edges of models. For more geometrically complex
models such as the Barricade, it sometimes randomly lightens the model
all over the place, which looks bad.

Author: slipher

src/engine/renderer/tr_init.cpp

@@ -1263,7 +1263,7 @@ ScreenshotCmd screenshotPNGRegistration("screenshotPNG", ssFormat_t::SSF_PNG, "p
 		Cvar::Latch( r_cubeProbeSpacing );
 
 		r_halfLambertLighting = Cvar_Get( "r_halfLambertLighting", "1", CVAR_LATCH | CVAR_ARCHIVE );
-		r_rimLighting = Cvar_Get( "r_rimLighting", "1",  CVAR_LATCH | CVAR_ARCHIVE );
+		r_rimLighting = Cvar_Get( "r_rimLighting", "0",  CVAR_LATCH | CVAR_ARCHIVE );
 		r_rimExponent = Cvar_Get( "r_rimExponent", "3", CVAR_CHEAT | CVAR_LATCH );
 		AssertCvarRange( r_rimExponent, 0.5, 8.0, false );