Show some information when TLS is enabled

[mh-concordium]

Description
Concordium-client can use TLS by providing --secure flag as available option. It would be useful to show in some way to the user that communication between client and server is secured.

On the opposite side, if the connection was not initiated properly (not providing --secure flag) while the server on another side has available TLS. Client hangs for over a minute and then throws an error.

Steps to Reproduce

PS C:\test\test-config> cc --secure --grpc-ip grpc.testnet.concordium.com consensus show-parameters
PS C:\test\test-config> cc --grpc-ip grpc.testnet.concordium.com consensus show-parameters

Expected Result

Provide more information to the user.

Actual Result

PS C:\test\test-config> cc --secure --grpc-ip grpc.testnet.concordium.com consensus show-parameters
Election nonce:      807c4deb87d044d12fd39c1f0eb077c95d6167ab92d7e917630755560ba2747c
Election difficulty: 2.5e-2

PS C:\test\test-config> cc --grpc-ip grpc.testnet.concordium.com consensus show-parameters
Error: Error getting chain parameters: I/O error: Cannot connect to GRPC server.`

Versions

• Software Version: 5.1.0