Support puma >= 5

[petitJAM]

The daemonize part of puma was removed in puma 5 and Subspace's config doesn't work with it now.

There's a gem here to add it back in: https://github.com/kigster/puma-daemon
It didn't just work as a drop-in replacement when I tried, and I did no further investigating, I just downgraded 😬.

Here's some discussion about the removal: puma/puma#1983

Not sure what the fix is, it could be really simple, but I haven't looked.

[petitJAM]

The workaround is just gem 'puma', '< 5'.

[samsonasu]

I think we should use init scripts as documented here: https://github.com/puma/puma/blob/master/docs/jungle/rc.d/README.md

[kigster]

Did anyone log an issue about what didn't work with puma-daemon?