Infer REPL type in cider-nrepl-send-* functions by default

This fixes the inspector not using the appropriate REPL connection for
the current buffer.

Author: ak-coram

cider-client.el

@@ -187,7 +187,7 @@ REQUEST is a pair list of the form (\"op\" \"operation\" \"par1-name\"
 If CONNECTION is provided dispatch to that connection instead of
 the current connection.  Return the id of the sent message.
 If TOOLING is truthy then the tooling session is used."
-  (nrepl-send-request request callback (or connection (cider-current-repl 'any 'ensure)) tooling))
+  (nrepl-send-request request callback (or connection (cider-current-repl nil 'ensure)) tooling))
 
 (defun cider-nrepl-send-sync-request (request &optional connection
                                               abort-on-input callback)
@@ -199,15 +199,15 @@ at the first sign of user input, so as not to hang the
 interface.
 if CALLBACK is non-nil, it will additionally be called on all received messages."
   (nrepl-send-sync-request request
-                           (or connection (cider-current-repl 'any 'ensure))
+                           (or connection (cider-current-repl nil 'ensure))
                            abort-on-input
                            nil
                            callback))
 
 (defun cider-nrepl-send-unhandled-request (request &optional connection)
   "Send REQUEST to the nREPL CONNECTION and ignore any responses.
 Immediately mark the REQUEST as done.  Return the id of the sent message."
-  (let* ((conn (or connection (cider-current-repl 'any 'ensure)))
+  (let* ((conn (or connection (cider-current-repl nil 'ensure)))
          (id (nrepl-send-request request #'ignore conn)))
     (with-current-buffer conn
       (nrepl--mark-id-completed id))