added MAC transformation option to the Format Index tag , fix #463 , thanks to @robitmoh
added MAC transformation option to the Format Index tag , fix #463 , thanks to @robitmoh

toni-moreno/snmpcollector,toni-moreno/snmpcollector,toni-moreno/snmpcollector,toni-moreno/snmpcollector,toni-moreno/snmpcollector