Problem:
If a server is attached to a non-current buffer by
`vim.lsp.buf_attach_client`, then the Language Server-related
commands may be created in the current (wrong) buffer.
Solution:
Always use the `bufnr` arg provided to `on_attach`.
Problem:
The name `server_configurations` is extremely verbose and irritatingly
formal and dogmatic. This overlong name is a constant nuisance when
reading, writing, and coding.
It's also not even correct: these configurations are just as much
"client" configurations as they are "server" configurations.
Solution:
- Rename to a shorter name.
- Leave placeholder files for any old URLs that link to the old
location.
