Petr's patch to merge r->notes, r->headers_out and r->err_headers_out

didn't call overlay_tables properly.  This is the only bug fix.
The other hunks are more destroy_sub_req()s that are similar to the other
cleanups that Petr's patch performed.

Submitted by: Dean Gaudet
Reviewed by: Roy Fielding, Chuck Murcko


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@77783 13f79535-47bb-0310-9956-ffa450edef68