Fixed use sending of opening and closing html,body,ul tags

* elwiki/log-sentinel, which is supposed to independent of Elnode, was
  trying to use elnode-http-send-string instead of elwiki/out->stream.

* The sending of the opening tags was moved from
  elwiki/http-commit-log to elwiki/commit-log and changed to use
  elwiki/out->stream.