Parse address from config if not provided with '--addr'

[rluetzner]

This fixes a bug where kes would try to split and evaluate the listen address, before the config file was read. This caused kes to fail if no --addr value was provided.

With this change, the config file is parsed before we try to determine the listen address. If the --addr parameter is provided, we override the value from the config as expected.

This fixes #418 .

[rluetzner]

If I remember correctly, kes previously used 7373 as it's default port. Has the default changed intentionally? If not, we should restore the default in case addr is neither defined as a CLI parameter or in a config file.

[aead]

Dup of #416 However, LGTM 👍

[rluetzner]

If I remember correctly, kes previously used 7373 as it's default port. Has the default changed intentionally? If not, we should restore the default in case addr is neither defined as a CLI parameter or in a config file.

@aead , have you read this comment as well? Is it expected that a listen address is defined "somewhere", either as a CLI parameter or in a config file? If no, we should add something like

if (addrFlag=="") {
    addrFlag == ":7373"
}

after we tried the config.

[aead]

I thought kesconf does set a default but apparently it does not. Also, it seems cleaner to read the config file as it is and not set any defaults at this layer. So, agree that the server should set the addr to 0.0.0.0:7373 if neither a CLI argument nor a config file value is present. 👍

[rluetzner]

Perfect. I see you've added #420 already. 🙂