Photo by Bridges Alex Fruchter. DJ RTC. Call him what you want, we just call him a Chicago industry legend. Label owner, journalist, DJ, promoter, professor, artist manager — he’s truly done it all. From his early days at HipHopCongress.org & SoundSlam.com in the early 2000s, to heading up the groundbreaking and game-changing Chicago-based blog, Ruby Hornet;…