Is your feature request related to a problem? Please describe.

When I switched from lein to Clojure CLI on MS Windows 10, cider-jack-in failed. The reason was unclear (to me anyway) from the error messaging. I found Alex Miller's documentation at
Install fails due to permission errors

After clojure-emacs/cider-nrepl@ed79316 the build started failing in a really way (like ClojureScript/Piggieback's missing). I can't see any connection between disabling suitable and the failure's, though.

Currently the eldoc type is either function or variable:

(defn- extract-eldoc
  [info]
  (if-let [arglists (seq (-> info extract-arglists format-arglists))]
    {:eldoc arglists :type "function"}
    {:type "variable"}))

This means that the result users see is not particularly accurate, not to mention that the function check is pretty primitive. We should add types like `m