Update to 3.6.2; preserve scores and config

• Update to 3.6.2
• Remove MARK_JOBS_UNSAFE, I have no problems building this on a MP machine without this.
• Preserve the sysconf, logfile, record, and xlogfile files across updates by copying them to *.sample and marking them with @sample in the packing list. This preserves user configuration changes (sysconf) and high score records (logfile, record, xlogfile).