org.el: Pass link match data to `org-file-apps' functions

* lisp/org.el (org--file-apps-entry-dlink-p): Fix it to pass match data
to handler functions from `org-open-file' alist when pattern field of
`org-file-apps' contains regexp subgroups.

Update `org--file-apps-entry-dlink-p' to use current convention for action
field of `org-file-apps' structure.  Currently it may be a function while
earlier s-expression was allowed.  Obsolete test wrongly separated actions
able to handle regexp subgroups matched in the link.  An example when
match data were not passed to the handler function:

    (add-to-list
     'org-file-apps
     '("\\.pdf\\(?:\\.gz\\|\\.bz2\\|\\.xz\\)?\\(?:::.*\\)?\\'"
        . my-open-pdf-locator))

Notice that lambda functions passed `consp' test, so namely
`defun' is required to reproduce the issue.

This change was missed in the commit:

     c8a3ab1e4 2016-02-03 18:30:17 +0100
     Nicolas Goaziou: `org-file-apps' accept functions instead of sexp

For discussion of the issue with evaluation of arbitrary expression see
https://list.orgmode.org/CALn3zoh+ACSU09eRurfwKjmCnw7i-_0KX7tA2jWqtu=vvQepLQ@mail.gmail.com/T/#u
Michael Brand. org-player and switch to lexical binding in org.el.
Sun, 17 Jan 2016 19:58:38 +0100

lisp/org.el

@@ -8002,7 +8002,7 @@ a parameter."
 	  (> (regexp-opt-depth selector) 0)
 	  (or (and (stringp action)
 		   (string-match "%[0-9]" action))
-	      (consp action))))
+	      (functionp action))))
     (_ nil)))
 
 (defun org--file-apps-regexp-alist (list &optional add-auto-mode)