cmd: fix environment variable names for options with dashes #407
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Environment variable names shall consist solely of uppercase letters, digits and the underscore character. When using environment variables, viper shall be instructed to replace '-' in option names by '_' in corresponding environment variables. Before this commit, using environment variables for options such as "tls-allow-insecure" was impossible. It can now be done by using "HUBBLE_TLS_ALLOW_INSECURE". Signed-off-by: Robin Hahling <robin.hahling@gw-computing.net>
Signed-off-by: Robin Hahling <robin.hahling@gw-computing.net>
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See commits for a longer explanation. This PR also updates the long help for the config command.