Since we're enforcing Boost >= 1.62, we no longer need HAVE_WORKING_BOOST_SLEEP_FOR.
Boost is currently at version 106200 in the depends subsystem so it is safe to remove code the refers to earlier versions. This closes #2445
This fixes the way arguments were passed to security-check, and also a typo in how BIND_NOW was being searched for in a list. Also fix how symbol-check is invoked although that script isn't currently used.