Updated daily_server_report_script scripts to support 10.7.x and 10.8.x

I've updated and tested my  daily_server_report_script scripts against
10.7.x Server and 10.8.x Server. My 10.5.x - 10.6.x script works
against 10.7.x Server without having to make changes.

For 10.8.x, I needed to update the PATH export and change the SSH
checks to scrape /var/log/system.log instead of the now-missing
/var/log/system.log.