Have you missed the vanilla ingame server browser? Me too!
swat4stats.com now offers a replacement for the long gone gamespy master server
To use the new master server, add these lines to the hosts file according to this guide made by Sun
18.104.22.168 swat4.available.gamespy.com 22.214.171.124 swat4.master.gamespy.com 126.96.36.199 swat4.ms15.gamespy.com
P.S. This feature wouldn't air without BaDTimE's invaluable help. All hail to him!