* bug fix: hook_init might be to late to declare token hooks (reported by skizzo) [#680444]

* bug fix: missing hook uninstall / variable cleanup (reported by skizzo) [#692812]
* bug fix: missing hook_comment 'update'
* unreachable bug: {node_comment_statistics}.comment_count doesn't considers unpublished comments
* commented code: for token consumer modules programmatically creating comments relying on [comment-auto-numbering]
* code cleanup: drop conditional support for unlanded patches [#695630]
* code cleanup: drop alpha's update functions (update_6003) [#689844]
* code cleanup: !isset($form['subject']) => subject disabled => handled on hook_comment insert/update
* code cleanup: use node_load($nid)->type instead of deprecated function node_get_types