#554838 by Dave Reid, savlis: Fixed phantom menu items and block errors on module disable or uninstall.

Add dev load and dev redner tabs for comments so that you can see their fields. alas, the comment permalink implementation is pretty bizaare from a menu perspective (it seems - din't investigate). so the new tabs can only be seen at comment/%comment/devel/load and comment/%comment/devel/render. thes pages are not linked on the comment permalink page - the node's tabs are.

devel_field_info() (page callback) is mistaken for hook_field_info() and causes fatal error on cache refresh.

Add callback and link in block that shows field info. Not sure how much more fields stuff belongs in devel. I'm open for more.

Remove SMTP library. Was conflicting with new simpletest provided library. Use reroute_mail module or other at http://drupal.org/project/modules?filters=tid:66&solrsort=sort_title%20asc