* subversion/tests/cmdline/update_tests.py
  (imports): Following up on r1489856, fixup imports.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1489858 13f79535-47bb-0310-9956-ffa450edef68
Improve cache statistics in particular for membuffer caches:
- show index bucket usage distribution
- show size stats only as an option
- provide global membuffer stats
Update our reporting code to use all these nice features.

* subversion/include/private/svn_cache.h
  (svn_cache__info_t): add bucket fill level histogram
  (svn_cache__get_info): add option to reduce output
  (svn_cache__membuffer_get_global_info): new private API function

* subversion/libsvn_subr/cache.c
  (svn_cache__format_info): extend implementation

* subversion/libsvn_fs_fs/caching.c
  (dump_cache_statistics): access stats only; skip unused caches
  (dump_global_cache_statistics): new utility function
  (svn_fs_fs__initialize_caches): register global stats dump

* subversion/libsvn_subr/cache-membuffer.c
  (svn_membuffer_get_segment_info): optionally include histogram
  (svn_membuffer_cache_get_info): update caller
  (svn_membuffer_get_global_segment_info): new utility
  (svn_cache__membuffer_get_global_info): implement new private API


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1489883 13f79535-47bb-0310-9956-ffa450edef68