The Illinois Department of Corrections is violating the constitutional rights of sex offenders who have served their time but can’t afford housing that meets with their parole officer’s approval, a federal judge held.In an opinion this week, U.S. District Judge Virginia M. Kendall wrote indigent inmates unable to obtain a suitable “host site” after completing their prison sentence are being kept behind bars for what is a “potentially endless” length of time.This practice results in the …