Warnings
1)	rdist has a bug that will cause it to do bad things if any source directories are non writable by the runner of this program.  Backing up to a device that already has non writable directories will make rdist abort the backup, even though it looks like it is still running. JumpBack checks for this situation and aborts if it finds it.  

2)	This program creates a .rhost file with the default umask that allows the user running this program to execute commands as themselves on  this machine. Some people will consider this  a security hole.  Since you have to be yourself logged in on this machine, it is not clear that this is a problem. Consult your local Un*x guru if this warning worries you. 

3)	Any file with lost+found in its path will not be copied.

4)	Any file with the same path as the destination device in it will not be copied.

5)	There may be a problem when backing up across NFS file systems.  This is an rdist feature.

6)	the ~  character always expands to the user's home directory, no matter what characters follow it.