First cut at a daemon that does regular checkups of the testbed hardware/software. * configure, configure.in: Add tbsetup/checkup directory. * db/audit.in: Add a listing of stuck checkups. * install/boss-install.in: Add 'elabckup' user. * rc.d/3.testbed.sh.in: Startup the checkup_daemon. * sql/database-create.sql, sql/database-migrate.txt: Add the checkups tables. * tbsetup/GNUmakefile.in: Descend into the checkup directory. * tbsetup/checkup: The checkup daemon, man page, and associated scripts. * tbsetup/ptopgen.in: Add a feature with a value of 0.9 to prereserved nodes to keep them from being allocated unless they're really wanted. * utils/firstuser.in: Add some other options so the script can be used to create other pseudo users.