Add DDNS support

[danilinao]

Input:

• Latest moonlight-nx release
• Latest kefir release
• 12.0.1 firmware
• Nintendo Switch v1 Fusee gelee (and seems situation on ns lite)

Don't works streaming if the address is presented as a domain (ddns). I open all needed ports, and it's works fine if connect to external ip in xxx.xxx.xxx.xxx format, but if edit setting.json manually and write in "address" ddns name, then the computer is detected, the games are displayed, but stream does not start and crashes with an error "failed to start stream"

[theroid]

Having the same Issue.

[AaronClover]

I am also interested in adding support for connecting by domain name instead of IP. This will also require an update to the UI's Add Host menu to support a full keyboard instead of just a number pad.