whonix_shared/usr/lib/whonix/timesync_prerequisite: reuse better code from whonix_shared/usr/lib/whonix/whonixcheck/19_2_check_tor_bootstrap which uses timeout, so sdwdate won't hang should CPFP be not timeout;
whonix_shared/usr/lib/whonix/whonixcheck/19_2_check_tor_bootstrap: refactoring
debugging
fix build script