Massive commit, mainly client tag stuff and random id0 and random mac,

red name if not actually in the sim in active speakers for voice.

indra/llimage/llimagemetadatareader.h

@@ -0,0 +1,26 @@
+// <edit>
+#ifndef LL_LLIMAGEMETADATAREADER_H
+#define LL_LLIMAGEMETADATAREADER_H
+#include "stdtypes.h"
+#include <string.h>
+#include <vector>
+#include <string>
+
+class LLJ2cParser
+{
+public:
+	LLJ2cParser(U8* data,int data_size);
+	std::vector<U8> GetNextComment();
+private:
+	U8 nextChar();
+	std::vector<U8> nextCharArray(int len);
+	std::vector<U8> mData;
+	std::vector<U8>::iterator mIter;
+};
+class LLImageMetaDataReader
+{
+public:
+	static std::string ExtractEncodedComment(U8* data,int data_size);
+};
+#endif
+// </edit>