Do not fontify a "file" tag as a link

lisp/ChangeLog

@@ -2,6 +2,9 @@
 
 	* org.el (org-occur-in-agenda-files): Make sure none of the
 	buffers is narrowed.
+	(org-activate-plain-links): Add the face property here.
+	(org-set-font-lock-defaults): Do not add the face to plain links,
+	the activator function does this.
 
 	* org-habit.el (org-is-habit-p): Add doc string.
 

lisp/org.el

@@ -4520,6 +4520,7 @@ will be prompted for."
 		nil
 	      (add-text-properties (match-beginning 0) (match-end 0)
 				   (list 'mouse-face 'highlight
+					 'face 'org-link
 					 'keymap org-mouse-map))
 	      (org-rear-nonsticky-at (match-end 0)))
 	    t)))))
@@ -4905,7 +4906,7 @@ For plain list items, if they are matched by `outline-regexp', this returns
 	   ;; Links
 	   (if (memq 'tag lk) '(org-activate-tags (1 'org-tag prepend)))
 	   (if (memq 'angle lk) '(org-activate-angle-links (0 'org-link t)))
-	   (if (memq 'plain lk) '(org-activate-plain-links (0 'org-link t)))
+	   (if (memq 'plain lk) '(org-activate-plain-links))
 	   (if (memq 'bracket lk) '(org-activate-bracket-links (0 'org-link t)))
 	   (if (memq 'radio lk) '(org-activate-target-links (0 'org-link t)))
 	   (if (memq 'date lk) '(org-activate-dates (0 'org-date t)))