Pullback: org-return-follows-link back to nil.

Setting this to t causes some issues which I need to think more
carefully about.

lisp/ChangeLog

@@ -2,6 +2,8 @@
 
 	* org.el (org-get-scheduled-time, org-get-deadline-time): New
 	functions.
+	(org-return-follows-link): Revert making this the default untile
+	issues are resolved.
 
 	* org-agenda.el (org-agenda-skip-if): New conditions timestamp and
 	nottimestamp.

lisp/org.el

@@ -1113,7 +1113,7 @@ Needs to be set before org.el is loaded."
   :group 'org-link-follow
   :type 'boolean)
 
-(defcustom org-return-follows-link t
+(defcustom org-return-follows-link nil
   "Non-nil means, on links RET will follow the link.
 Needs to be set before org.el is loaded."
   :group 'org-link-follow