Problem:
- remote_ssh.sh detects ssh disconnect by writing a heartbeat every 1s,
which the local side buffers for the whole session.
- The server's stdout (e.g. `io.write()` from a random plugin) writes to
the tunnel, which in theory may contain a bogus "NVIM_READY".
- A nightly install is never updated on the remote.
Solution:
- Supervise the server in `vim.net._ssh.serve()` (Lua). It detects
disconnect via stdin EOF and discards server stdout. The script only
finds or installs `nvim`.
- Also a step toward Windows remotes.
- User may choose "Update Nvim" to reinstall the nightly.
Justin M. Keyes
893d90fced