Add airplay column for servers

[MansM]

Add a column that specifies if a server can output to an airplay device (like a receiver etc) over network

[basings]

@MansM do you mean airplay from apple? https://www.apple.com/airplay/

[MansM]

Yes, like synology's audio station, which can direct audio to airplay devices.

[basings]

@MansM k, let's add it. Do you know if any server that's listed supports airplay?

[BillButter]

I think Airplay is an app feature, not a server feature.

[MansM]

@BillButter in many cases yes, but Audio station on a synology can do it, why shouldnt a music server not also to be able to stream/cast is... DLNA is currently also available as an option

[clach04]

OwnTone - see #141

[basings]

Would it be better to add a column "cast" where one could specify "DLNA" and "airplay" or should it be separate columns?