small comments updates

c64/,,config_custom.s

@@ -145,4 +145,4 @@
 
 // Other
 
-// #define CONFIG_COMPRESSION_LVL_2         // work on this option stopped - it would not give any improvement
+// #define CONFIG_COMPRESSION_LVL_2         // work on this option stopped - for now it has no chance to improve anything

tools/generate_strings.cc

@@ -954,6 +954,8 @@ bool DictEncoder::optimizeJoin()
 
 void DictEncoder::optimizeOrder()
 {
+	// XXX - it would be better to do this after the dictionary is compressed
+
 	// Try to optimize order of strings in the dictionary for fastest display
 	// - put the shorter substrings first
 	// - for strings with roughly the same length put more frequently used first