Clarifying the persisting of server setup

[kevinlewi]

Addresses #343

[daxpedda]

Suggested change

	/// instance of [ServerSetup]. Instead, use [ServerSetup::serialize] and
	/// [ServerSetup::deserialize] for this purpose.
	/// instance of [`ServerSetup`]. Instead, use [`ServerSetup::serialize`] and
	/// [`ServerSetup::deserialize`] for this purpose.

[kevinlewi]

The styling for the rest of the documentation is not using backticks for the structs / functions at the moment, but I'll try changing this style for the entire file to see how it looks and will address these changes in its own PR.