logcli able to specify authorization header

[domcyrus]

Is your feature request related to a problem? Please describe.
Unable to specify authorization header in logcli. It is hardcoded to be "Authorization" which unfortunately doesn't work for me.

Describe the solution you'd like
Make an optional flag to be able to specify the authorization header name. It defaults to Authorization and therefore doesn't introduce any change of behavior for existing users.

Describe alternatives you've considered
Create a proxy in between logcli and the server which could inject or alter the headername.

Additional context