This finishes the mod_dir/mod_negotiation bug. This final part of the

This finishes the mod_dir/mod_negotiation bug.  This final part of the
solution ensures that we don't lose filters if they are added later than
we expect.  The problem could be seen if a connection filter was added
after a request-based filter was added in the past.  The problem was that
the request-based filters pointed to the first filter in the connection
record, so the new connection filter was never called.  Now, all filters
are put on their correct filter lists, and we are sure to always update
all pointers when adding a filter.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@93683 13f79535-47bb-0310-9956-ffa450edef68