* Add dump_all_pools and dump_pool_and_childs.

* Add dump_all_pools and dump_pool_and_childs.

  - dump_all_pools: Dump the whole pool hierarchy starting from apr_global_pool.
                    Requires an arbitrary pool as starting parameter.
  - dump_pool_and_childs: Dump the whole pool hierarchy starting from
                          the given pool.

  dump_pool_and_childs is written in Python using the GDB Python API
  as doing recursive stuff in standard GDB macros is very difficult.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1811192 13f79535-47bb-0310-9956-ffa450edef68