Allows TLS secure mode to be set via a global parameter

[julianleonard123]

There are three pieces of info that need to be provided to the zed client for it to make a successful request to the server: endpoint , token, tls mode.

Each of these can be set on the context of course. But it is not possible to set the tls mode to secure with a global flag, and thus override the context. (Or run a command if no context has been set at all). It is possible to pass the --insecure flag but there is no corresponding way to unset that flag.

i.e. you can run a command like this which doesn't depend on your context at all, and it works fine for localhost/plain text connections

zed <command> --endpoint <endpoint> --token <token> --insecure

but there is no corresponding:

zed <command> --endpoint <endpoint> --token <token> --insecure false

This makes it impossible to run a command, via TLS, that doesn't depend on the context being set prior to the command.