Changing a 'fatal' to a 'warning' on rsync handler.

Using 'warning' and 'return' instead of a fatal at rotate_long if
backuproot doesn't exist. Using a warning ensures that the backup
action can process the other includes and not just exit.

handlers/rsync.in

@@ -391,7 +391,8 @@ function rotate_long {
   local metadata
 
   if [ ! -d "$backuproot" ]; then
-    fatal "Skipping rotate of $backuproot as it doesn't exist."
+    warning "Skipping rotate of $backuproot as it doesn't exist."
+    return
   fi
 
   for rottype in daily weekly monthly; do