Readme is not exhaustive about configuration options

[almereyda]

The Readme explains how to pass Server Options, but doesn't show a simple list which ones exist. The ones explained below at least lack an explanation about farm mode.
There are also a plenty of other options in the JSON objects at fedwiki/wiki-security-passportjs#10 (comment)

[WardCunningham]

We are certainly behind on documenting options and happy to have this reminder in the issues. We have recently talked of updating the list. However, we have some trouble making the list complete. There are no invalid options. Plugins can look for whatever options they choose. A plugin should certainly document any options it examines but that probably wouldn't end up in the wiki command Readme.

There probably exists strategies for parameters that should be discussed somewhere. When to use the various forms and which ones do and don't make sense together. This would be best documented in the Tips for Administrator pages.