After soundly thrashing Celtic FC in a friendly two weeks ago, MLS-leading DC United will take on another international power, only this time it’s the mighty Real Madrid. Due to scheduling conflicts at the local stadiums and Real’s already booked West Coast tour, this friendly will be played in Seattle at Qwest Field on August 9th at 11 p.m. ET. We here at DCist are bummed that we won’t be able to watch this…