Replace old and crufty script to generate a max_sliver_lifetime
override credential. New script is less crufty, I think. Usage: genextendcred -t <days> [-e <days>] -s <slice> [-u <user> | -c <cert>] genextendcred -t <days> [-e <days>] -u <user> | -c <cert> Options: -s - Slice to use. If no user, issue to slice creator. In the absence of a slice, the target is the CM, allowing the user to extend any of his slivers. -u - Issue to user -c - Issue to user via his public certificate -t - How many days to allow extension for -e - How many days before credential expires; default 5 days Note that the renewsliver.py and renewslice.pl test scripts now take one of these credentials as an extra argument.