Add support for detecting rio in textual diagnose

[davep]

It looks like rio doesn't currently advertise itself via TERM_PROGRAM or via any other obvious environment variable. The result is it comes out as *Unknown*.

It looks like XPC_SERVICE_NAME is always set (on macOS anyway) to something that starts with application.com.raphaelamorim.rio so this can work as a fallback detection method.

[willmcgugan]

Rio looks like one to watch. Maybe you could also post an issue on their repo asking for TERM_PROGRAM to be set?

[davep]

@willmcgugan Yeah, I've discovered a few issues with it in my brief play this morning, so I was going to take some time this weekend, hopefully, to drive in and make notes and then issue some things (see also function keys seemingly not working, line characters not performing well, some characters not lining up well, screens not fully drawing often, etc...).

[davep]

Raised this specific one as raphamorim/rio#200

[davep]

No longer necessary as support for TERM_PROGRAM has now been added to rio.