A simplified replacement for `plugins.lsp`.
Eventually, once the `lsp` and `plugins.lspconfig` modules are mature,
`plugins.lsp` will be deprecated and/or aliased.
This allows users to override the name used for a given `lsp.servers.*`
entry. The default is still the attr-name.
This may be useful to inject raw lua, or to configure the same server in
different ways via different attrs.