[Mostly minor] Correction to Unserved locations and allocation estimates

According to the Federal Communications Commission's new National Broadband Map, there are 8.3 million Unserved locations in the U.S. The FCC published “LBR Wireless” files for 41 states. As I rushed to download the data, I didn’t know what that meant as they hadn’t ever published them before, so I skipped them. I now know that to mean “Licensed by Rule” wireless. (An example is the General Authorized Access (GAA) spectrum that can be used in the CBRS band.) In general, the differences are small, as they only impact locations where the LBR coverage filing moves a location from Unserved to Underserved or Served. But there are a few states where it made a bigger difference. In Missouri, more than 60,000 locations become Underserved or Served. In Illinois, over 40,000 locations are no longer Unserved. Texas and Wisconsin are honorable mentions.