Support dns server name in config

[alex6dj]

Hi, Im testing nutcase and looks great. I have a little request seems that the server section only supports an IP address but my server dont have a fixed IP. I think in the future this can be supported.

servers:
  - server: "192.168.10.100" # -> nas-server

Thanks for the great work.
Note: English is no my main language

[ArthurMitchell42]

Hello, I'm glad you are enjoying the app.
Currently the app is limited to an IPv4 number since this is by far the most popular way to make a network stable. DNS is the source of so many temporary network problems that people usually avoid using it for infrastructure things like UPS's.
I will review the code and look at the implications of doing this but I can not promise to change this in the near future.