Revision 1657451

On the reuse-ra-session branch: Add explicit session reuse in libsvn_client.

* BRANCH-README: Update status.

* subversion/libsvn_client/add.c (mkdir_urls),
  subversion/libsvn_client/blame.c (svn_client_blame5),
  subversion/libsvn_client/cat.c (svn_client_cat3),
  subversion/libsvn_client/checkout.c (svn_client__checkout_internal),
  subversion/libsvn_client/commit.c (svn_client_commit6),
  subversion/libsvn_client/copy.c (repos_to_repos_copy,
                                   wc_to_repos_copy,
                                   repos_to_wc_copy),
  subversion/libsvn_client/copy_foreign.c (svn_client__copy_foreign),
  subversion/libsvn_client/diff.c (diff_repos_repos, diff_repos_wc),
  subversion/libsvn_client/export.c (handle_external_item_change),
  subversion/libsvn_client/import.c (svn_client_import5),
  subversion/libsvn_client/info.c (svn_client_info4),
  subversion/libsvn_client/iprops.c (get_inheritable_props),
  subversion/libsvn_client/list.c (list_internal),
  subversion/libsvn_client/locking_commands.c (svn_client_lock,
                                               svn_client_unlock),
  subversion/libsvn_client/log.c (svn_client__get_copy_source),
  subversion/libsvn_client/merge.c (merge_locked,
                                    merge_reintegrate_locked,
                                    merge_peg_locked,
                                    find_automatic_merge_no_wc,
                                    client_find_automatic_merge),
  subversion/libsvn_client/mergeinfo.c (get_mergeinfo,
                                        logs_for_mergeinfo_rangelist,
                                        svn_client__mergeinfo_log,
                                        svn_client_suggest_merge_sources),
  subversion/libsvn_client/prop_commands.c (propset_on_url,
                                            svn_client_revprop_set2,
                                            svn_client_propget5,
                                            svn_client_revprop_get,
                                            get_remote_props,
                                            svn_client_revprop_list),
  subversion/libsvn_client/ra.c (svn_client__repos_locations),
  subversion/libsvn_client/status.c (svn_client_status6),
  subversion/libsvn_client/switch.c (switch_internal),
  subversion/libsvn_client/update.c (svn_client__update_internal),
  subversion/libsvn_client/util.c (svn_client_get_repos_root):
   Release locally created sessions if there were no errors.


* subversion/libsvn_client/mergeinfo.c (svn_client__get_wc_or_repos_mergeinfo_catalog),
  subversion/libsvn_client/ra.c (svn_client__get_youngest_common_ancestor),
  subversion/libsvn_client/status.c (reporter_finish_report):
   Remove the session management pool. Instead, release locally
   created sessions if there were no errors.

* subversion/libsvn_client/commit.c (check_url_kind),
  subversion/libsvn_client/delete.c (delete_urls_multi_repos),
  subversion/libsvn_client/log.c (pre_15_receiver),
  subversion/libsvn_client/merge.c (ensure_ra_session_url):
   Add commend about adding explicit session reuse.