Extended SDP Backup:
* Directory /p4/ssl is now backed up.
* Instance Bin (/p4/N/bin) directories are no backed up.
* Files in Instance Directories (e.g. /p4/N/.p4tickets) are backed up.
* Files in /p4 are backed up.
With this change, all necessary files that live on the OS Root Volume
can be recovered from files on the backup volume, including that
outside the /p4/common structure.