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

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