Removed useless virtual keyword for GSISocketServer class.
Removed useless virtual keyword for GSISocketServer class.

git-svn-id: 9f8245c2fc8403b5f6cf9bee529bcfbd9d562db8@1411 5daf30ca-8a0d-0410-8b79-804c1d55056c

giacomini/voms,ellert/voms,giacomini/voms,italiangrid/voms,ellert/voms,italiangrid/voms,ellert/voms,giacomini/voms,italiangrid/voms