[cs615asa] Instances

[Paul-Anthony Dudzinski]

Hello,
I was wondering how people were taking care of the EC2_BACKUP_FLAGS_AWS
environment variable . The user can put all sorts of garbage in here that
can wreak havoc on this program. Is it within spec to limit this program to
take only a subset of these flags or should we simply assume that the user
is competent enough and if at any point any environment variable causes a
command to fail we should exit 1?

-PA
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