#395086 by Freso: call trim() before truncate_utf8() in comment module for better quality truncation.

#195161 by mcarbone with some modifications: only show 'login to post comments' if logging in actually lets you post comments. Backport by salvis.

#93425 by bjaspan: remove pre-Drupal 4.6 era destination handling cruft carried over in comment module

#55277 by catch and JirkaRybka: when flat comment view is used, order comments by cid (ie. original submission order) instead of timestamp (ie. last editing time order) to avoid comments jumping around when being edited

#183390 by hunmonk: forms should use form_state['redirect'] for redirection, not drupal_goto() - fix this in comment_admin_overview_submit()

#180559 by hunmonk: do not try to display the comment addition form at th end of comments, if we are already on the page, so it is displayed anyway

 Backport from HEAD.