expose http proxy configuration via IPC commands

[scareything]

No description provided.

[mjtrangoni]

@qrkourier we need this for supporting the new http_proxy feature with ziti-edge-tunnel helm chart.

Since 0.22.31, -x|--proxy type://[username[:password]@]hostname_or_ip:port proxy to use when connecting to OpenZiti controller and edge routers. 'http' is currently the only supported type.-

This should be optional and if possible configurable via Environment variables like the Identity.

[qrkourier]

@mjtrangoni I think I see what you mean. The k8s deployments do not use IPC because they're not configured interactively, and need to configure the proxy with env vars or command line options.