Rush Limbaugh will return to the radio airwaves Nov. 17, MediaDailyNews has learned. The move follows the conservative radio talk show host's well- publicized stay in a treatment center for substance abuse. Limbaugh recently celebrated his 15th year in radio and is also the industry's biggest star, garnering top ratings for many of the 650 stations that run his three-hour afternoon talk show and boasting 20 million listeners every week. But in early October, the radio commentator suffered professional and personal reverses. First, he quit ESPN's "Sunday Night Football" after a controversial on-air stint where he took Philadelphia Eagles quarterback...