Add "classify" keyvalue to override monster classification.

src/dlls/barney.cpp

@@ -186,6 +186,11 @@ int CMBarney :: ISoundMask ( void)
 //=========================================================
 int	CMBarney :: Classify ( void )
 {
+	if ( m_iClassifyOverride == -1 ) // helper
+		return CLASS_NONE;
+	else if ( m_iClassifyOverride > 0 )
+		return m_iClassifyOverride; // override
+	
 	return	CLASS_PLAYER_ALLY;
 }