Added check for duplicated entries on address list.
Added check for duplicated entries on address list.

crythias/otrs,muehlbauer/otrs,rudy500/otrs,xhoy/otrs,moritz/otrs,nilei/otrs,s7design/otrs,brandonshults01/otrs,StCyr/otrs,oiami/otrs,StCyr/otrs,s7design/otrs,crythias/otrs,capeit-tto/otrs,thorsteneckel/otrs,crythias/otrs,rudy500/otrs,mbeijen/otrs-1,rudy500/otrs,rudy500/otrs,brandonshults01/otrs,nilei/otrs,muehlbauer/otrs,eliasp/otrs,PortgasDAce/otrs,nilei/otrs,crythias/otrs,rudy500/otrs,vlascoder/otrs,mburggraf/otrs,MBRG/otrs,thorsteneckel/otrs,moritz/otrs,balazj/otrs,balazj/otrs,brandonshults01/otrs,StCyr/otrs,mbeijen/otrs-1,PortgasDAce/otrs,mburggraf/otrs,oiami/otrs,thorsteneckel/otrs,PortgasDAce/otrs,xhoy/otrs,oiami/otrs,linearregression/otrs,eliasp/otrs,noritnk/otrs,brandonshults01/otrs,muehlbauer/otrs,oiami/otrs,PortgasDAce/otrs,noritnk/otrs,oiami/otrs,s7design/otrs,vlascoder/otrs,mbeijen/otrs-1,moritz/otrs,nilei/otrs,linearregression/otrs,linearregression/otrs,vlascoder/otrs,mburggraf/otrs,eliasp/otrs,balazj/otrs,noritnk/otrs,capeit-tto/otrs,linearregression/otrs,xhoy/otrs,capeit-tto/otrs,xhoy/otrs,mburggraf/otrs,moritz/otrs,s7design/otrs,balazj/otrs,eliasp/otrs,s7design/otrs,MBRG/otrs,muehlbauer/otrs,StCyr/otrs,thorsteneckel/otrs,PortgasDAce/otrs,muehlbauer/otrs,balazj/otrs,MBRG/otrs,linearregression/otrs,eliasp/otrs,xhoy/otrs,MBRG/otrs,mburggraf/otrs,StCyr/otrs,moritz/otrs,brandonshults01/otrs,crythias/otrs,thorsteneckel/otrs,MBRG/otrs,nilei/otrs