Fix the close-on-sendfile bug where Win32 would transmit a single
  sendfile bucket and then lose it's socket, and fix a comment.

Submitted by:  Ryan Morgan <rmorgan@covalent.net>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@93524 13f79535-47bb-0310-9956-ffa450edef68