Solve the merge bugs, by storing a copy bit to save us a ton of
  reallocation in the merge config phase.  Should keep most of the
  savings realized by moving to tables.

  Need others to vet this code, please!  Look at this and the prior
  patch as a single diff (-r n -r n-2) to see the overall changes.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@89865 13f79535-47bb-0310-9956-ffa450edef68