light: add "minlight_mottle" as an alias for "minlightMottle"

docs/light.rst

@@ -376,6 +376,14 @@ func_detail/func_group as well, if qbsp from these tools is used.
    Set the minimum light level for any surface of the brush model.
    Default 0.
 
+   .. note:: Q2 uses a 0..1 scale for this key
+
+.. bmodel-key:: "_minlight_mottle" "n"
+                "_minlightMottle" "n"
+
+   Whether minlight should have a mottled pattern. Defaults
+   to 1 in Q2 mode and 0 otherwise.
+
 .. bmodel-key:: "_minlight_exclude" "texname"
 
    Faces with the given texture are excluded from receiving minlight on

light/light.cc

@@ -135,7 +135,7 @@ modelinfo_t::modelinfo_t(const mbsp_t *b, const dmodelh2_t *m, float lmscale)
       offset{},
       minlight{this, "minlight", 0},
       maxlight{this, "maxlight", 0},
-      minlightMottle{this, "minlightMottle", false},
+      minlightMottle{this, {"minlight_mottle", "minlightMottle"}, false},
       shadow{this, "shadow", 0},
       shadowself{this, {"shadowself", "selfshadow"}, 0},
       shadowworldonly{this, "shadowworldonly", 0},