Handle (and ignore by default) the new GenericStreamingMessage

This is _enormously_ spammy, good god. Apparently related to PBR.

hippolyzer/apps/proxy_gui.py

@@ -234,7 +234,7 @@ class MessageLogWindow(QtWidgets.QMainWindow):
                      "ParcelDwellReply ParcelAccessListReply AttachedSoundGainChange " \
                      "ParcelPropertiesRequest ParcelProperties GetObjectCost GetObjectPhysicsData ObjectImage " \
                      "ViewerAsset GetTexture SetAlwaysRun GetDisplayNames MapImageService MapItemReply " \
-                     "AgentFOV".split(" ")
+                     "AgentFOV GenericStreamingMessage".split(" ")
     DEFAULT_FILTER = f"!({' || '.join(ignored for ignored in DEFAULT_IGNORE)})"
 
     textRequest: QtWidgets.QTextEdit

hippolyzer/lib/base/message/data/message_template.msg

@@ -5802,6 +5802,25 @@ version 2.0
 	}
 }
 
+// GenericStreamingMessage
+// Optimized generic message for streaming arbitrary data to viewer
+// Avoid payloads over 7KB (8KB ceiling)
+// Method -- magic number indicating method to use to decode payload:
+//      0x4175 - GLTF material override data
+// Payload -- data to be decoded
+{
+    GenericStreamingMessage High 31 Trusted Unencoded
+    {
+        MethodData Single
+        { Method    U16 }
+    }
+
+    {
+        DataBlock Single
+        { Data Variable 2 }
+    }
+}
+
 // LargeGenericMessage
 // Similar to the above messages, but can handle larger payloads and serialized
 // LLSD.  Uses HTTP transport