This quest was marked obsolete by Blizzard and cannot be obtained or completed.
Go to the front gates of Orgrimmar, read the Warchief's Proclamation and search 5 Orgrimmar Citizens. Keep anything suspicious that you find.
My men recently discovered a group of cultists attempting to sneak into the city. The flow of traffic into Orgrimmar has come to a halt. The Warchief has decreed that all visitors must be searched before they can enter the gates. Take this copy of his proclamation and read it to the people assembled at the front gates, then assist the guards there in searching those who wish to enter.