Two television networks with “NBC” in their names — MSNBC and CNBC — will no longer have any corporate connection to NBC News once a spinoff formally takes effect in about a year. Comcast is cutting loose several of its cable companies into a separate company in order to improve its bottom line. It leaves several questions, particularly for MSNBC. Will the news network geared to liberal viewers continue to use NBC News personnel? Will it have to leave its offices and studios at the NBC News headquarters in New York's Rockefeller Center? Will they even keep the same names?