added official and locally used abbreviations for Cambodian subdivisions
added official and locally used abbreviations for Cambodian subdivisions

JuanitoFatas/countries,thieunus/countries,ohenrik/countries,dropstream/countries,GUI/countries,namely/countries,HomeStayTravel/countries,musicglue/countries,chargify/countries,xronos-i-am/countries,charitywater/countries,jeffrey410469/countries,touristly/countries,fabn/countries,vcita/countries,Savedo/countries,adriagalin/countries,aminin/countries,burningpony/countries,uzbekjon/countries,nutmegdevelopment/countries,tenforwardconsulting/countries,7Dump/countries,hexorx/countries